diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/billing.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/billing.json
index 95c0890e34e7..0af8d52cbe50 100644
--- a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/billing.json
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/billing.json
@@ -1400,6 +1400,54 @@
         }
       }
     },
+    "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{invoiceSectionName}/billingSubscriptions/{billingSubscriptionName}/validateTransferEligibility": {
+      "post": {
+        "x-ms-examples": {
+          "SubscriptionTransferValidateSuccess": {
+            "$ref": "./examples/ValidateSubscriptionTransferSuccess.json"
+          },
+          "SubscriptionTransferValidateFailure": {
+            "$ref": "./examples/ValidateSubscriptionTransferFailure.json"
+          }
+        },
+        "operationId": "BillingSubscriptions_ValidateTransfer",
+        "description": "Validates the transfer of billing subscriptions across invoice sections.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/invoiceSectionNameParameter"
+          },
+          {
+            "$ref": "#/parameters/billingSubscriptionNameParameter"
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/TransferBillingSubscriptionRequestProperties"
+            },
+            "description": "Parameters supplied to the Transfer Billing Subscription operation."
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/ValidateSubscriptionTransferEligibilityResult"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    },
     "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/products": {
       "get": {
         "tags": [
@@ -1611,6 +1659,54 @@
         }
       }
     },
+    "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{invoiceSectionName}/products/{productName}/validateTransferEligibility": {
+      "post": {
+        "x-ms-examples": {
+          "SubscriptionTransferValidateSuccess": {
+            "$ref": "./examples/ValidateProductTransferSuccess.json"
+          },
+          "SubscriptionTransferValidateFailure": {
+            "$ref": "./examples/ValidateProductTransferFailure.json"
+          }
+        },
+        "operationId": "Products_ValidateTransfer",
+        "description": "Validates the transfer of products across invoice sections.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/invoiceSectionNameParameter"
+          },
+          {
+            "$ref": "#/parameters/productNameParameter"
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/TransferProductRequestProperties"
+            },
+            "description": "Parameters supplied to the Transfer Products operation."
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/ValidateProductTransferEligibilityResult"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    },
     "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/transactions": {
       "get": {
         "tags": [
@@ -3691,8 +3787,12 @@
       "description": "The properties of the product to initiate a transfer.",
       "properties": {
         "destinationInvoiceSectionId": {
-          "description": "Destination invoice section id.",
-          "type": "string"
+          "type": "string",
+          "description": "The destination invoice section id."
+        },
+        "destinationBillingProfileId": {
+          "type": "string",
+          "description": "The destination billing profile id."
         }
       }
     },
@@ -3735,9 +3835,64 @@
         "destinationInvoiceSectionId": {
           "type": "string",
           "description": "The destination invoice section id."
+        },
+        "destinationBillingProfileId": {
+          "type": "string",
+          "description": "The destination billing profile id."
+        }
+      }
+    },
+    "ValidateSubscriptionTransferEligibilityResult": {
+      "type": "object",
+      "description": "Result of the transfer eligibility validation.",
+      "properties": {
+        "isTransferEligible": {
+          "description": "Specifies whether the transfer is eligible or not.",
+          "type": "boolean",
+          "readOnly": true
+        },
+        "errorDetails": {
+          "description": "Validation error details.",
+          "$ref": "#/definitions/ValidateSubscriptionTransferEligibilityError"
+        }
+      }
+    },
+    "ValidateSubscriptionTransferEligibilityError": {
+      "type": "object",
+      "description": "Error details of the transfer eligibility validation",
+      "properties": {
+        "code": {
+          "description": "Error code for the product transfer validation.",
+          "$ref": "#/definitions/SubscriptionTransferValidationErrorCode"
+        },
+        "message": {
+          "description": "The error message.",
+          "type": "string"
+        },
+        "details": {
+          "description": "Detailed error message explaining the error.",
+          "type": "string"
         }
       }
     },
+    "SubscriptionTransferValidationErrorCode": {
+      "type": "string",
+      "description": "Error code of the transfer validation response.",
+      "enum": [
+        "InvalidSource",
+        "SubscriptionNotActive",
+        "InsufficientPermissionOnSource",
+        "InsufficientPermissionOnDestination",
+        "DestinationBillingProfilePastDue",
+        "SubscriptionTypeNotSupported",
+        "CrossBillingAccountNotAllowed",
+        "NotAvailableForDestinationMarket"
+      ],
+      "x-ms-enum": {
+        "name": "subscriptionTransferValidationErrorCode",
+        "modelAsString": true
+      }
+    },
     "UpdateAutoRenewOperationSummary": {
       "type": "object",
       "description": "Summary of cancel product operation",
@@ -4738,6 +4893,58 @@
         }
       }
     },
+    "ValidateProductTransferEligibilityResult": {
+      "type": "object",
+      "description": "Result of the product transfer eligibility validation.",
+      "properties": {
+        "isTransferEligible": {
+          "description": "Specifies whether the transfer is eligible or not.",
+          "type": "boolean",
+          "readOnly": true
+        },
+        "errorDetails": {
+          "description": "Validation error details.",
+          "$ref": "#/definitions/ValidateProductTransferEligibilityError"
+        }
+      }
+    },
+    "ValidateProductTransferEligibilityError": {
+      "type": "object",
+      "description": "Error details of the product transfer eligibility validation.",
+      "properties": {
+        "code": {
+          "description": "Error code for the product transfer validation.",
+          "$ref": "#/definitions/ProductTransferValidationErrorCode"
+        },
+        "message": {
+          "description": "The error message.",
+          "type": "string"
+        },
+        "details": {
+          "description": "Detailed error message explaining the error.",
+          "type": "string"
+        }
+      }
+    },
+    "ProductTransferValidationErrorCode": {
+      "type": "string",
+      "description": "Error code of the transfer validation response.",
+      "enum": [
+        "InvalidSource",
+        "ProductNotActive",
+        "InsufficientPermissionOnSource",
+        "InsufficientPermissionOnDestination",
+        "DestinationBillingProfilePastDue",
+        "ProductTypeNotSupported",
+        "CrossBillingAccountNotAllowed",
+        "NotAvailableForDestinationMarket",
+        "OneTimePurchaseProductTransferNotAllowed"
+      ],
+      "x-ms-enum": {
+        "name": "productTransferValidationErrorCode",
+        "modelAsString": true
+      }
+    },
     "BillingSubscriptionsListResult": {
       "description": "Result of listing billing subscriptions summary.",
       "properties": {
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferBillingSubscription.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferBillingSubscription.json
index e9558c7d3d8b..28691c89e30f 100644
--- a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferBillingSubscription.json
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferBillingSubscription.json
@@ -5,7 +5,8 @@
     "invoiceSectionName": "{invoiceSectionName}",
     "billingSubscriptionName": "{billingSubscriptionName}",
     "parameters": {
-      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}"
+      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}",
+      "destinationBillingProfileId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{newBillingProfileName}"
     }
   },
   "responses": {
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferProduct.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferProduct.json
index adcce68ee2c7..dc49de699f96 100644
--- a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferProduct.json
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/TransferProduct.json
@@ -5,7 +5,8 @@
     "invoiceSectionName": "{invoiceSectionName}",
     "productName": "{productName}",
     "parameters": {
-      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}"
+      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}",
+      "destinationBillingProfileId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{newBillingProfileName}"
     }
   },
   "responses": {
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateProductTransferFailure.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateProductTransferFailure.json
new file mode 100644
index 000000000000..de33919caad3
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateProductTransferFailure.json
@@ -0,0 +1,23 @@
+{
+  "parameters": {
+    "api-version": "2018-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "invoiceSectionName": "{invoiceSectionName}",
+    "productName": "{productName}",
+    "parameters": {
+      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}",
+      "destinationBillingProfileId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{newBillingProfileName}"
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "isTransferEligible": false,
+        "errorDetails": {
+          "code" : "ProductTypeNotSupported",
+          "message" : "Product '{productName}' is not allowed to be transferred."
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateProductTransferSuccess.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateProductTransferSuccess.json
new file mode 100644
index 000000000000..7edb141ae853
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateProductTransferSuccess.json
@@ -0,0 +1,19 @@
+{
+  "parameters": {
+    "api-version": "2018-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "invoiceSectionName": "{invoiceSectionName}",
+    "productName": "{productName}",
+    "parameters": {
+      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}",
+      "destinationBillingProfileId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{newBillingProfileName}"
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+          "isTransferEligible": true
+       }
+     }
+  }
+}
\ No newline at end of file
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateSubscriptionTransferFailure.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateSubscriptionTransferFailure.json
new file mode 100644
index 000000000000..e0004f41cd19
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateSubscriptionTransferFailure.json
@@ -0,0 +1,23 @@
+{
+  "parameters": {
+    "api-version": "2018-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "invoiceSectionName": "{invoiceSectionName}",
+    "billingSubscriptionName": "{billingSubscriptionName}",
+    "parameters": {
+      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}",
+      "destinationBillingProfileId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{newBillingProfileName}"
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "isTransferEligible": false,
+        "errorDetails": {
+            "code" : "SubscriptionNotActive",
+            "message" : "Invoice Sections can only be changed for active subscriptions."
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateSubscriptionTransferSuccess.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateSubscriptionTransferSuccess.json
new file mode 100644
index 000000000000..c5e93cf366ec
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2018-11-01-preview/examples/ValidateSubscriptionTransferSuccess.json
@@ -0,0 +1,19 @@
+{
+  "parameters": {
+    "api-version": "2018-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "invoiceSectionName": "{invoiceSectionName}",
+    "billingSubscriptionName": "{billingSubscriptionName}",
+    "parameters": {
+      "destinationInvoiceSectionId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/invoiceSections/{newInvoiceSectionName}",
+      "destinationBillingProfileId": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{newBillingProfileName}"
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+          "isTransferEligible": true
+       }
+     }
+  }
+}
\ No newline at end of file