diff --git a/src/main/proto/com/kodypay/grpc/ecom/v1/ecom.proto b/src/main/proto/com/kodypay/grpc/ecom/v1/ecom.proto
index 863076a..6a7e78b 100644
--- a/src/main/proto/com/kodypay/grpc/ecom/v1/ecom.proto
+++ b/src/main/proto/com/kodypay/grpc/ecom/v1/ecom.proto
@@ -13,6 +13,7 @@ service KodyEcomPaymentsService {
   rpc PaymentDetails(PaymentDetailsRequest) returns (PaymentDetailsResponse);
   rpc GetPayments(GetPaymentsRequest) returns (GetPaymentsResponse);
   rpc GetCardToken(GetCardTokenRequest) returns (GetCardTokenResponse);
+  rpc Refund(RefundRequest) returns (stream RefundResponse);
 }
 
 // Payment Initiation Request
@@ -179,3 +180,25 @@ message GetPaymentsResponse {
     }
   }
 }
+
+message RefundRequest {
+  string store_id = 1; // UUID of store
+  string payment_id = 2; // Payment id created by wombat
+  string amount = 3; // amount in BigDecimal/2.dp (0.00)
+}
+message RefundResponse {
+  RefundStatus status = 1;
+  optional string failure_reason = 2; // only populated on failure
+  string payment_id = 3;
+  google.protobuf.Timestamp date_created = 4;
+  string total_paid_amount = 5;
+  string total_amount_refunded = 6;
+  string remaining_amount = 7;
+  string total_amount_requested = 8;
+  string paymentTransactionId = 9;
+  enum RefundStatus {
+    PENDING = 0;
+    REQUESTED = 1;
+    FAILED = 2;
+  }
+}
diff --git a/src/main/proto/com/kodypay/grpc/pay/v1/pay.proto b/src/main/proto/com/kodypay/grpc/pay/v1/pay.proto
index a4ce459..cb3a5f9 100644
--- a/src/main/proto/com/kodypay/grpc/pay/v1/pay.proto
+++ b/src/main/proto/com/kodypay/grpc/pay/v1/pay.proto
@@ -71,10 +71,7 @@ message PaymentDetailsRequest {
 // requires X-API-Key header with 'API Key' value
 message RefundRequest {
   string store_id = 1; // UUID of store
-  oneof id {
-    string order_id = 2;
-    string payment_id = 4; //Payment id created by wombat
-  }
+  string order_id = 2;
   string amount = 3; // amount in BigDecimal/2.dp (0.00)
 }
 message RefundResponse {