diff --git a/lib/PayPal/Api/Invoice.php b/lib/PayPal/Api/Invoice.php
index 1413215..85da974 100644
--- a/lib/PayPal/Api/Invoice.php
+++ b/lib/PayPal/Api/Invoice.php
@@ -35,8 +35,8 @@ use PayPal\Validation\UrlValidator;
  * @property string merchant_memo
  * @property string logo_url
  * @property \PayPal\Api\Currency total_amount
- * @property \PayPal\Api\PaymentDetail[] payment_details
- * @property \PayPal\Api\RefundDetail[] refund_details
+ * @property \PayPal\Api\PaymentDetail[] payments
+ * @property \PayPal\Api\RefundDetail[] refunds
  * @property \PayPal\Api\Metadata metadata
  * @property string additional_data
  */
@@ -567,13 +567,13 @@ class Invoice extends PayPalResourceModel
     /**
      * List of payment details for the invoice.
      *
-     * @param \PayPal\Api\PaymentDetail[] $payment_details
+     * @param \PayPal\Api\PaymentDetail[] $payments
      * 
      * @return $this
      */
-    public function setPaymentDetails($payment_details)
+    public function setPayments($payments)
     {
-        $this->payment_details = $payment_details;
+        $this->payments = $payments;
         return $this;
     }
 
@@ -582,9 +582,9 @@ class Invoice extends PayPalResourceModel
      *
      * @return \PayPal\Api\PaymentDetail[]
      */
-    public function getPaymentDetails()
+    public function getPayments()
     {
-        return $this->payment_details;
+        return $this->payments;
     }
 
     /**
@@ -595,11 +595,11 @@ class Invoice extends PayPalResourceModel
      */
     public function addPaymentDetail($paymentDetail)
     {
-        if (!$this->getPaymentDetails()) {
-            return $this->setPaymentDetails(array($paymentDetail));
+        if (!$this->getPayments()) {
+            return $this->setPayments(array($paymentDetail));
         } else {
-            return $this->setPaymentDetails(
-                array_merge($this->getPaymentDetails(), array($paymentDetail))
+            return $this->setPayments(
+                array_merge($this->getPayments(), array($paymentDetail))
             );
         }
     }
@@ -612,21 +612,21 @@ class Invoice extends PayPalResourceModel
      */
     public function removePaymentDetail($paymentDetail)
     {
-        return $this->setPaymentDetails(
-            array_diff($this->getPaymentDetails(), array($paymentDetail))
+        return $this->setPayments(
+            array_diff($this->getPayments(), array($paymentDetail))
         );
     }
 
     /**
      * List of refund details for the invoice.
      *
-     * @param \PayPal\Api\RefundDetail[] $refund_details
+     * @param \PayPal\Api\RefundDetail[] $refunds
      * 
      * @return $this
      */
-    public function setRefundDetails($refund_details)
+    public function setRefunds($refunds)
     {
-        $this->refund_details = $refund_details;
+        $this->refunds = $refunds;
         return $this;
     }
 
@@ -635,9 +635,9 @@ class Invoice extends PayPalResourceModel
      *
      * @return \PayPal\Api\RefundDetail[]
      */
-    public function getRefundDetails()
+    public function getRefunds()
     {
-        return $this->refund_details;
+        return $this->refunds;
     }
 
     /**
@@ -648,11 +648,11 @@ class Invoice extends PayPalResourceModel
      */
     public function addRefundDetail($refundDetail)
     {
-        if (!$this->getRefundDetails()) {
-            return $this->setRefundDetails(array($refundDetail));
+        if (!$this->getRefunds()) {
+            return $this->setRefunds(array($refundDetail));
         } else {
-            return $this->setRefundDetails(
-                array_merge($this->getRefundDetails(), array($refundDetail))
+            return $this->setRefunds(
+                array_merge($this->getRefunds(), array($refundDetail))
             );
         }
     }
@@ -665,8 +665,8 @@ class Invoice extends PayPalResourceModel
      */
     public function removeRefundDetail($refundDetail)
     {
-        return $this->setRefundDetails(
-            array_diff($this->getRefundDetails(), array($refundDetail))
+        return $this->setRefunds(
+            array_diff($this->getRefunds(), array($refundDetail))
         );
     }
 
diff --git a/release_notes.md b/release_notes.md
index b110911..b9f2d4c 100644
--- a/release_notes.md
+++ b/release_notes.md
@@ -34,6 +34,9 @@ v1.0.0
   * PayPal\Common\FormatConverter => PayPal\Converter\FormatConverter
   * PayPal\Rest\RestHandler => PayPal\Handler\RestHandler
   * PayPal\Rest\OauthHandler => PayPal\Handler\OauthHandler
+* Fixes to Methods
+  * PayPal\Api\Invoice->getPaymentDetails() was renamed to getPayments()
+  * PayPal\Api\Invoice->getRefundDetails() was renamed to getRefunds()
 
 v1.0.0-beta
 ----
diff --git a/sample/doc/assets/behavior.js b/sample/doc/assets/behavior.js
index fc30630..88f5f6f 100644
--- a/sample/doc/assets/behavior.js
+++ b/sample/doc/assets/behavior.js
@@ -48,37 +48,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "billing/CreateBillingAgreementWithPayPal",
             "title": "CreateBillingAgreementWithPayPal"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Create Billing Agreement with PayPal as Payment Source",
-                "slug": "create-billing-agreement-with-paypal-as-payment-source"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Agreement",
-                    "slug": "create-agreement"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Get redirect url",
-                    "slug": "get-redirect-url"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -258,29 +228,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "billing/UpdatePlan",
             "title": "UpdatePlan"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Update a plan",
-                "slug": "update-a-plan"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Making Plan Active",
-                    "slug": "making-plan-active"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -380,7 +328,29 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/GetInvoice",
             "title": "GetInvoice"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Get Invoice Sample",
+                "slug": "get-invoice-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Retrieve Invoice",
+                    "slug": "retrieve-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }, {
           "type": "file",
           "data": {
@@ -416,7 +386,45 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/RecordPayment",
             "title": "RecordPayment"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Record Payment Sample",
+                "slug": "record-payment-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Record Object",
+                    "slug": "record-object"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Record Payment for Invoice",
+                    "slug": "record-payment-for-invoice"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Retrieve Invoice",
+                    "slug": "retrieve-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }, {
           "type": "file",
           "data": {
@@ -434,7 +442,45 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/RecordRefund",
             "title": "RecordRefund"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Record Refund Sample",
+                "slug": "record-refund-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Record Object",
+                    "slug": "record-object"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Record Refund for Invoice",
+                    "slug": "record-refund-for-invoice"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Retrieve Invoice",
+                    "slug": "retrieve-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }, {
           "type": "file",
           "data": {
@@ -452,7 +498,45 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/RemindInvoice",
             "title": "RemindInvoice"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Remind Invoice Sample",
+                "slug": "remind-invoice-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Notification Object",
+                    "slug": "notification-object"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Remind Invoice",
+                    "slug": "remind-invoice"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Retrieve Invoice",
+                    "slug": "retrieve-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }, {
           "type": "file",
           "data": {
@@ -506,7 +590,37 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/SendInvoice",
             "title": "SendInvoice"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Create Invoice Sample",
+                "slug": "create-invoice-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Send Invoice",
+                    "slug": "send-invoice"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Retrieve Invoice",
+                    "slug": "retrieve-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }, {
           "type": "file",
           "data": {
@@ -524,7 +638,53 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "invoice/UpdateInvoice",
             "title": "UpdateInvoice"
           },
-          "depth": 2
+          "depth": 2,
+          "outline": [
+            {
+              "type": "heading",
+              "data": {
+                "level": 1,
+                "title": "Update Invoice Sample",
+                "slug": "update-invoice-sample"
+              },
+              "depth": 1,
+              "children": [
+                {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Update Invoice",
+                    "slug": "update-invoice"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "NOTE: These are the work-around added to the",
+                    "slug": "note-these-are-the-work-around-added-to-the"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Update Invoice",
+                    "slug": "update-invoice"
+                  },
+                  "depth": 3
+                }, {
+                  "type": "heading",
+                  "data": {
+                    "level": 3,
+                    "title": "Retrieve Invoice",
+                    "slug": "retrieve-invoice"
+                  },
+                  "depth": 3
+                }
+              ]
+            }
+          ]
         }
       ]
     }, {
@@ -552,18 +712,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "lipp/GenerateAccessTokenFromRefreshToken",
             "title": "GenerateAccessTokenFromRefreshToken"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "Obtain Access Token From Refresh Token",
-                "slug": "obtain-access-token-from-refresh-token"
-              },
-              "depth": 3
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -581,18 +730,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "lipp/GetUserInfo",
             "title": "GetUserInfo"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "Obtain Access Token From Refresh Token",
-                "slug": "obtain-access-token-from-refresh-token"
-              },
-              "depth": 3
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -610,18 +748,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "lipp/ObtainUserConsent",
             "title": "ObtainUserConsent"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "Get User Consent URL",
-                "slug": "get-user-consent-url"
-              },
-              "depth": 3
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -639,18 +766,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "lipp/UserConsentRedirect",
             "title": "UserConsentRedirect"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "User Consent Response",
-                "slug": "user-consent-response"
-              },
-              "depth": 3
-            }
-          ]
+          "depth": 2
         }
       ]
     }, {
@@ -822,56 +938,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "notifications/createWebhook",
             "title": "createWebhook"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Create Webhook Sample",
-                "slug": "create-webhook-sample"
-              },
-              "depth": 1
-            }, {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Basic Information",
-                "slug": "basic-information"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 4,
-                    "title": "NOTE: Please note that you need an https url for paypal webhooks. You can however override the url with https, and accept",
-                    "slug": "note-please-note-that-you-need-an-https-url-for-paypal-webhooks-you-can-however-override-the-url-with-https-and-accept"
-                  },
-                  "depth": 4
-                }
-              ]
-            }, {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Event Types",
-                "slug": "event-types"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Webhook",
-                    "slug": "create-webhook"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }
       ]
     }, {
@@ -899,29 +966,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payment-experience/CreateWebProfile",
             "title": "CreateWebProfile"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "Create Web Profile",
-                "slug": "create-web-profile"
-              },
-              "depth": 3,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 4,
-                    "title": "Payment Web experience profile resource",
-                    "slug": "payment-web-experience-profile-resource"
-                  },
-                  "depth": 4
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -939,18 +984,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payment-experience/DeleteWebProfile",
             "title": "DeleteWebProfile"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 4,
-                "title": "Delete Web Profile",
-                "slug": "delete-web-profile"
-              },
-              "depth": 4
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -968,18 +1002,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payment-experience/GetWebProfile",
             "title": "GetWebProfile"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "Get Web Profile",
-                "slug": "get-web-profile"
-              },
-              "depth": 3
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -997,18 +1020,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payment-experience/ListWebProfiles",
             "title": "ListWebProfiles"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 3,
-                "title": "Retrieve List of All Web Profiles",
-                "slug": "retrieve-list-of-all-web-profiles"
-              },
-              "depth": 3
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1108,93 +1120,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payments/AuthorizePaymentUsingPayPal",
             "title": "AuthorizePaymentUsingPayPal"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Authorize Payment using PayPal as payment method",
-                "slug": "authorize-payment-using-paypal-as-payment-method"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payer",
-                    "slug": "payer"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Itemized information",
-                    "slug": "itemized-information"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Additional payment details",
-                    "slug": "additional-payment-details"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Amount",
-                    "slug": "amount"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Transaction",
-                    "slug": "transaction"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Redirect urls",
-                    "slug": "redirect-urls"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payment",
-                    "slug": "payment"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Payment",
-                    "slug": "create-payment"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Get redirect url",
-                    "slug": "get-redirect-url"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1212,77 +1138,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payments/CreateFuturePayment",
             "title": "CreateFuturePayment"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Create Payment using PayPal as payment method",
-                "slug": "create-payment-using-paypal-as-payment-method"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payer",
-                    "slug": "payer"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Amount",
-                    "slug": "amount"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Transaction",
-                    "slug": "transaction"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Redirect urls",
-                    "slug": "redirect-urls"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payment",
-                    "slug": "payment"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Get Refresh Token",
-                    "slug": "get-refresh-token"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Future Payment",
-                    "slug": "create-future-payment"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1300,93 +1156,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payments/CreatePayment",
             "title": "CreatePayment"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "CreatePaymentSample",
-                "slug": "createpaymentsample"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "CreditCard",
-                    "slug": "creditcard"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "FundingInstrument",
-                    "slug": "fundinginstrument"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payer",
-                    "slug": "payer"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Itemized information",
-                    "slug": "itemized-information"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Additional payment details",
-                    "slug": "additional-payment-details"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Amount",
-                    "slug": "amount"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Transaction",
-                    "slug": "transaction"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payment",
-                    "slug": "payment"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Payment",
-                    "slug": "create-payment"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1404,93 +1174,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payments/CreatePaymentUsingPayPal",
             "title": "CreatePaymentUsingPayPal"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Create Payment using PayPal as payment method",
-                "slug": "create-payment-using-paypal-as-payment-method"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payer",
-                    "slug": "payer"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Itemized information",
-                    "slug": "itemized-information"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Additional payment details",
-                    "slug": "additional-payment-details"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Amount",
-                    "slug": "amount"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Transaction",
-                    "slug": "transaction"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Redirect urls",
-                    "slug": "redirect-urls"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Payment",
-                    "slug": "payment"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Payment",
-                    "slug": "create-payment"
-                  },
-                  "depth": 3
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Get redirect url",
-                    "slug": "get-redirect-url"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1698,72 +1382,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payouts/CreateBatchPayout",
             "title": "CreateBatchPayout"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Create Bulk Payout Sample",
-                "slug": "create-bulk-payout-sample"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "NOTE:",
-                    "slug": "note"
-                  },
-                  "depth": 3,
-                  "children": [
-                    {
-                      "type": "heading",
-                      "data": {
-                        "level": 4,
-                        "title": "Batch Header Instance",
-                        "slug": "batch-header-instance"
-                      },
-                      "depth": 4
-                    }, {
-                      "type": "heading",
-                      "data": {
-                        "level": 4,
-                        "title": "Sender Item",
-                        "slug": "sender-item"
-                      },
-                      "depth": 4
-                    }, {
-                      "type": "heading",
-                      "data": {
-                        "level": 4,
-                        "title": "Sender Item 2",
-                        "slug": "sender-item-2"
-                      },
-                      "depth": 4
-                    }, {
-                      "type": "heading",
-                      "data": {
-                        "level": 4,
-                        "title": "Sender Item 3",
-                        "slug": "sender-item-3"
-                      },
-                      "depth": 4
-                    }
-                  ]
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Payout",
-                    "slug": "create-payout"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1781,56 +1400,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payouts/CreateSinglePayout",
             "title": "CreateSinglePayout"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Create Single Synchronous Payout Sample",
-                "slug": "create-single-synchronous-payout-sample"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "NOTE:",
-                    "slug": "note"
-                  },
-                  "depth": 3,
-                  "children": [
-                    {
-                      "type": "heading",
-                      "data": {
-                        "level": 4,
-                        "title": "Batch Header Instance",
-                        "slug": "batch-header-instance"
-                      },
-                      "depth": 4
-                    }, {
-                      "type": "heading",
-                      "data": {
-                        "level": 4,
-                        "title": "Sender Item",
-                        "slug": "sender-item"
-                      },
-                      "depth": 4
-                    }
-                  ]
-                }, {
-                  "type": "heading",
-                  "data": {
-                    "level": 3,
-                    "title": "Create Payout",
-                    "slug": "create-payout"
-                  },
-                  "depth": 3
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1848,40 +1418,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payouts/GetPayoutBatchStatus",
             "title": "GetPayoutBatchStatus"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Get Payout Batch Status Sample",
-                "slug": "get-payout-batch-status-sample"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 2,
-                    "title": "Payout Batch ID",
-                    "slug": "payout-batch-id"
-                  },
-                  "depth": 2,
-                  "children": [
-                    {
-                      "type": "heading",
-                      "data": {
-                        "level": 3,
-                        "title": "Get Payout Batch Status",
-                        "slug": "get-payout-batch-status"
-                      },
-                      "depth": 3
-                    }
-                  ]
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }, {
           "type": "file",
           "data": {
@@ -1899,40 +1436,7 @@ f.event={add:function(a,c,d,e,g){var h,i,j,k,l,m,n,o,p,q,r,s;if(!(a.nodeType===3
             "pageTitle": "payouts/GetPayoutItemStatus",
             "title": "GetPayoutItemStatus"
           },
-          "depth": 2,
-          "outline": [
-            {
-              "type": "heading",
-              "data": {
-                "level": 1,
-                "title": "Get Payout Item Status Sample",
-                "slug": "get-payout-item-status-sample"
-              },
-              "depth": 1,
-              "children": [
-                {
-                  "type": "heading",
-                  "data": {
-                    "level": 2,
-                    "title": "Payout Item ID",
-                    "slug": "payout-item-id"
-                  },
-                  "depth": 2,
-                  "children": [
-                    {
-                      "type": "heading",
-                      "data": {
-                        "level": 3,
-                        "title": "Get Payout Item Status",
-                        "slug": "get-payout-item-status"
-                      },
-                      "depth": 3
-                    }
-                  ]
-                }
-              ]
-            }
-          ]
+          "depth": 2
         }
       ]
     }, {
diff --git a/sample/doc/invoice/RecordPayment.html b/sample/doc/invoice/RecordPayment.html
index c7b76e6..ee4d6d0 100644
--- a/sample/doc/invoice/RecordPayment.html
+++ b/sample/doc/invoice/RecordPayment.html
@@ -25,6 +25,18 @@ notification object
     <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
 }
 
-ResultPrinter::printResult(<span class="hljs-string">"Payment for Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$record</span>, <span class="hljs-keyword">null</span>);
+ResultPrinter::printResult(<span class="hljs-string">"Payment for Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$record</span>, <span class="hljs-keyword">null</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="retrieve-invoice">Retrieve Invoice</h3>
+<p>Retrieve the invoice object by calling the
+static <code>get</code> method
+on the Invoice class by passing a valid
+Invoice ID
+(See bootstrap.php for more on <code>ApiContext</code>)</p></div></div><div class="code"><div class="wrapper"><span class="hljs-keyword">try</span> {
+    <span class="hljs-variable">$invoice</span> = Invoice::get(<span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$apiContext</span>);
+} <span class="hljs-keyword">catch</span> (<span class="hljs-keyword">Exception</span> <span class="hljs-variable">$ex</span>) {
+    ResultPrinter::printError(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$ex</span>);
+    <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
+}
+
+ResultPrinter::printResult(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>);
 
 <span class="hljs-keyword">return</span> <span class="hljs-variable">$invoice</span>;</div></div></div></div></body></html>
\ No newline at end of file
diff --git a/sample/doc/invoice/RecordRefund.html b/sample/doc/invoice/RecordRefund.html
index b0c5e1e..8280bb4 100644
--- a/sample/doc/invoice/RecordRefund.html
+++ b/sample/doc/invoice/RecordRefund.html
@@ -24,6 +24,18 @@ notification object
     <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
 }
 
-ResultPrinter::printResult(<span class="hljs-string">"Refund for Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$refund</span>, <span class="hljs-keyword">null</span>);
+ResultPrinter::printResult(<span class="hljs-string">"Refund for Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$refund</span>, <span class="hljs-keyword">null</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="retrieve-invoice">Retrieve Invoice</h3>
+<p>Retrieve the invoice object by calling the
+static <code>get</code> method
+on the Invoice class by passing a valid
+Invoice ID
+(See bootstrap.php for more on <code>ApiContext</code>)</p></div></div><div class="code"><div class="wrapper"><span class="hljs-keyword">try</span> {
+    <span class="hljs-variable">$invoice</span> = Invoice::get(<span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$apiContext</span>);
+} <span class="hljs-keyword">catch</span> (<span class="hljs-keyword">Exception</span> <span class="hljs-variable">$ex</span>) {
+    ResultPrinter::printError(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$ex</span>);
+    <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
+}
+
+ResultPrinter::printResult(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>);
 
 <span class="hljs-keyword">return</span> <span class="hljs-variable">$invoice</span>;</div></div></div></div></body></html>
\ No newline at end of file
diff --git a/sample/doc/invoice/RemindInvoice.html b/sample/doc/invoice/RemindInvoice.html
index 69b3eeb..428df8a 100644
--- a/sample/doc/invoice/RemindInvoice.html
+++ b/sample/doc/invoice/RemindInvoice.html
@@ -24,4 +24,18 @@ notification object
     <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
 }
 
-ResultPrinter::printResult(<span class="hljs-string">"Remind Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-keyword">null</span>, <span class="hljs-variable">$notify</span>, <span class="hljs-keyword">null</span>);</div></div></div></div></body></html>
\ No newline at end of file
+ResultPrinter::printResult(<span class="hljs-string">"Remind Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-keyword">null</span>, <span class="hljs-variable">$notify</span>, <span class="hljs-keyword">null</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="retrieve-invoice">Retrieve Invoice</h3>
+<p>Retrieve the invoice object by calling the
+static <code>get</code> method
+on the Invoice class by passing a valid
+Invoice ID
+(See bootstrap.php for more on <code>ApiContext</code>)</p></div></div><div class="code"><div class="wrapper"><span class="hljs-keyword">try</span> {
+    <span class="hljs-variable">$invoice</span> = Invoice::get(<span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$apiContext</span>);
+} <span class="hljs-keyword">catch</span> (<span class="hljs-keyword">Exception</span> <span class="hljs-variable">$ex</span>) {
+    ResultPrinter::printError(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$ex</span>);
+    <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
+}
+
+ResultPrinter::printResult(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>);
+
+<span class="hljs-keyword">return</span> <span class="hljs-variable">$invoice</span>;</div></div></div></div></body></html>
\ No newline at end of file
diff --git a/sample/doc/invoice/SendInvoice.html b/sample/doc/invoice/SendInvoice.html
index 95c50aa..2a81325 100644
--- a/sample/doc/invoice/SendInvoice.html
+++ b/sample/doc/invoice/SendInvoice.html
@@ -13,6 +13,18 @@ with a valid ApiContext (See bootstrap.php for more on <code>ApiContext</code>)<
     <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
 }
 
-ResultPrinter::printResult(<span class="hljs-string">"Send Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-keyword">null</span>, <span class="hljs-keyword">null</span>);
+ResultPrinter::printResult(<span class="hljs-string">"Send Invoice"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-keyword">null</span>, <span class="hljs-keyword">null</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="retrieve-invoice">Retrieve Invoice</h3>
+<p>Retrieve the invoice object by calling the
+static <code>get</code> method
+on the Invoice class by passing a valid
+Invoice ID
+(See bootstrap.php for more on <code>ApiContext</code>)</p></div></div><div class="code"><div class="wrapper"><span class="hljs-keyword">try</span> {
+    <span class="hljs-variable">$invoice</span> = Invoice::get(<span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$apiContext</span>);
+} <span class="hljs-keyword">catch</span> (<span class="hljs-keyword">Exception</span> <span class="hljs-variable">$ex</span>) {
+    ResultPrinter::printError(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$ex</span>);
+    <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
+}
+
+ResultPrinter::printResult(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>);
 
 <span class="hljs-keyword">return</span> <span class="hljs-variable">$invoice</span>;</div></div></div></div></body></html>
\ No newline at end of file
diff --git a/sample/doc/invoice/UpdateInvoice.html b/sample/doc/invoice/UpdateInvoice.html
index ff27d5c..15bb597 100644
--- a/sample/doc/invoice/UpdateInvoice.html
+++ b/sample/doc/invoice/UpdateInvoice.html
@@ -18,6 +18,18 @@ with a valid ApiContext (See bootstrap.php for more on <code>ApiContext</code>)<
     <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
 }
 
-ResultPrinter::printResult(<span class="hljs-string">"Invoice Updated"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$request</span>, <span class="hljs-variable">$invoice</span>);
+ResultPrinter::printResult(<span class="hljs-string">"Invoice Updated"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$request</span>, <span class="hljs-variable">$invoice</span>);</div></div></div><div class="segment"><div class="comments "><div class="wrapper"><h3 id="retrieve-invoice">Retrieve Invoice</h3>
+<p>Retrieve the invoice object by calling the
+static <code>get</code> method
+on the Invoice class by passing a valid
+Invoice ID
+(See bootstrap.php for more on <code>ApiContext</code>)</p></div></div><div class="code"><div class="wrapper"><span class="hljs-keyword">try</span> {
+    <span class="hljs-variable">$invoice</span> = Invoice::get(<span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$apiContext</span>);
+} <span class="hljs-keyword">catch</span> (<span class="hljs-keyword">Exception</span> <span class="hljs-variable">$ex</span>) {
+    ResultPrinter::printError(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$ex</span>);
+    <span class="hljs-keyword">exit</span>(<span class="hljs-number">1</span>);
+}
+
+ResultPrinter::printResult(<span class="hljs-string">"Get Invoice (Not Required - For Sample Only)"</span>, <span class="hljs-string">"Invoice"</span>, <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>-&gt;getId(), <span class="hljs-variable">$invoice</span>);
 
 <span class="hljs-keyword">return</span> <span class="hljs-variable">$invoice</span>;</div></div></div></div></body></html>
\ No newline at end of file
diff --git a/sample/invoice/RecordPayment.php b/sample/invoice/RecordPayment.php
index cd3f7a7..fed036a 100644
--- a/sample/invoice/RecordPayment.php
+++ b/sample/invoice/RecordPayment.php
@@ -36,4 +36,19 @@ try {
 
 ResultPrinter::printResult("Payment for Invoice", "Invoice", $invoice->getId(), $record, null);
 
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
 return $invoice;
diff --git a/sample/invoice/RecordRefund.php b/sample/invoice/RecordRefund.php
index 99277b3..b9d803b 100644
--- a/sample/invoice/RecordRefund.php
+++ b/sample/invoice/RecordRefund.php
@@ -35,4 +35,19 @@ try {
 
 ResultPrinter::printResult("Refund for Invoice", "Invoice", $invoice->getId(), $refund, null);
 
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
 return $invoice;
diff --git a/sample/invoice/RemindInvoice.php b/sample/invoice/RemindInvoice.php
index 9904eee..1881724 100644
--- a/sample/invoice/RemindInvoice.php
+++ b/sample/invoice/RemindInvoice.php
@@ -36,3 +36,19 @@ try {
 
 ResultPrinter::printResult("Remind Invoice", "Invoice", null, $notify, null);
 
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
+return $invoice;
diff --git a/sample/invoice/SendInvoice.php b/sample/invoice/SendInvoice.php
index 9c3493d..ac9abd5 100644
--- a/sample/invoice/SendInvoice.php
+++ b/sample/invoice/SendInvoice.php
@@ -22,4 +22,19 @@ try {
 
 ResultPrinter::printResult("Send Invoice", "Invoice", $invoice->getId(), null, null);
 
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
 return $invoice;
diff --git a/sample/invoice/UpdateInvoice.php b/sample/invoice/UpdateInvoice.php
index efbb1e1..1668f8f 100644
--- a/sample/invoice/UpdateInvoice.php
+++ b/sample/invoice/UpdateInvoice.php
@@ -35,4 +35,19 @@ try {
 
 ResultPrinter::printResult("Invoice Updated", "Invoice", $invoice->getId(), $request, $invoice);
 
+// ### Retrieve Invoice
+// Retrieve the invoice object by calling the
+// static `get` method
+// on the Invoice class by passing a valid
+// Invoice ID
+// (See bootstrap.php for more on `ApiContext`)
+try {
+    $invoice = Invoice::get($invoice->getId(), $apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Get Invoice (Not Required - For Sample Only)", "Invoice", $invoice->getId(), $invoice->getId(), $invoice);
+
 return $invoice;
diff --git a/tests/PayPal/Test/Api/InvoiceTest.php b/tests/PayPal/Test/Api/InvoiceTest.php
index 9a4a9ce..1c07242 100644
--- a/tests/PayPal/Test/Api/InvoiceTest.php
+++ b/tests/PayPal/Test/Api/InvoiceTest.php
@@ -22,7 +22,7 @@ class InvoiceTest extends \PHPUnit_Framework_TestCase
      */
     public static function getJson()
     {
-        return '{"id":"TestSample","number":"TestSample","uri":"TestSample","status":"TestSample","merchant_info":' .MerchantInfoTest::getJson() . ',"billing_info":' .BillingInfoTest::getJson() . ',"shipping_info":' .ShippingInfoTest::getJson() . ',"items":' .InvoiceItemTest::getJson() . ',"invoice_date":"TestSample","payment_term":' .PaymentTermTest::getJson() . ',"discount":' .CostTest::getJson() . ',"shipping_cost":' .ShippingCostTest::getJson() . ',"custom":' .CustomAmountTest::getJson() . ',"tax_calculated_after_discount":true,"tax_inclusive":true,"terms":"TestSample","note":"TestSample","merchant_memo":"TestSample","logo_url":"http://www.google.com","total_amount":' .CurrencyTest::getJson() . ',"payment_details":' .PaymentDetailTest::getJson() . ',"refund_details":' .RefundDetailTest::getJson() . ',"metadata":' .MetadataTest::getJson() . ',"additional_data":"TestSample"}';
+        return '{"id":"TestSample","number":"TestSample","uri":"TestSample","status":"TestSample","merchant_info":' .MerchantInfoTest::getJson() . ',"billing_info":' .BillingInfoTest::getJson() . ',"shipping_info":' .ShippingInfoTest::getJson() . ',"items":' .InvoiceItemTest::getJson() . ',"invoice_date":"TestSample","payment_term":' .PaymentTermTest::getJson() . ',"discount":' .CostTest::getJson() . ',"shipping_cost":' .ShippingCostTest::getJson() . ',"custom":' .CustomAmountTest::getJson() . ',"tax_calculated_after_discount":true,"tax_inclusive":true,"terms":"TestSample","note":"TestSample","merchant_memo":"TestSample","logo_url":"http://www.google.com","total_amount":' .CurrencyTest::getJson() . ',"payments":' .PaymentDetailTest::getJson() . ',"refunds":' .RefundDetailTest::getJson() . ',"metadata":' .MetadataTest::getJson() . ',"additional_data":"TestSample"}';
     }
 
     /**
@@ -63,8 +63,8 @@ class InvoiceTest extends \PHPUnit_Framework_TestCase
         $this->assertNotNull($obj->getMerchantMemo());
         $this->assertNotNull($obj->getLogoUrl());
         $this->assertNotNull($obj->getTotalAmount());
-        $this->assertNotNull($obj->getPaymentDetails());
-        $this->assertNotNull($obj->getRefundDetails());
+        $this->assertNotNull($obj->getPayments());
+        $this->assertNotNull($obj->getRefunds());
         $this->assertNotNull($obj->getMetadata());
         $this->assertNotNull($obj->getAdditionalData());
         $this->assertEquals(self::getJson(), $obj->toJson());
@@ -97,8 +97,8 @@ class InvoiceTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals($obj->getMerchantMemo(), "TestSample");
         $this->assertEquals($obj->getLogoUrl(), "http://www.google.com");
         $this->assertEquals($obj->getTotalAmount(), CurrencyTest::getObject());
-        $this->assertEquals($obj->getPaymentDetails(), PaymentDetailTest::getObject());
-        $this->assertEquals($obj->getRefundDetails(), RefundDetailTest::getObject());
+        $this->assertEquals($obj->getPayments(), PaymentDetailTest::getObject());
+        $this->assertEquals($obj->getRefunds(), RefundDetailTest::getObject());
         $this->assertEquals($obj->getMetadata(), MetadataTest::getObject());
         $this->assertEquals($obj->getAdditionalData(), "TestSample");
     }