diff --git a/api-references/payments/billpay/api-integration.json b/api-references/payments/billpay/api-integration.json
index 99c77ac0..d3bebba6 100644
--- a/api-references/payments/billpay/api-integration.json
+++ b/api-references/payments/billpay/api-integration.json
@@ -3188,7 +3188,8 @@
                               "Account Transfer",
                               "Bharat QR",
                               "USSD",
-                              "BHIM Aadhaar Pay"
+                              "BHIM Aadhaar Pay",
+                              "CBDC"
                             ]
                           },
                           "selectedPaymentOptions": {
@@ -3235,6 +3236,39 @@
                             "minLength": 6,
                             "type": "string",
                             "example": "BD019181220291"
+                          },
+                          "payerAccountType": {
+                            "type": "string",
+                            "example": "Savings",
+                            "enum": [
+                              "Savings",
+                              "Current",
+                              "NonBank_Wallet",
+                              "Bank_Wallet",
+                              "Credit_Card",
+                              "Credit_Line",
+                              "NonBank_Prepaid_Card",
+                              "Bank_Prepaid_Card"
+                            ]
+                          },
+                          "paymentFlowIdentification": {
+                            "type": "string",
+                            "example": "Pay",
+                            "enum": [
+                              "BQR",
+                              "Collect_VPA",
+                              "Intent",
+                              "Pay",
+                              "QR"
+                            ]
+                          },
+                          "autoPay": {
+                            "type": "string",
+                            "example": "Yes",
+                            "enum": [
+                              "Yes",
+                              "No"
+                            ]
                           }
                         }
                       },