diff --git a/interface/models/payment/payment.yaml b/interface/models/payment/payment.yaml
index 60747533..64a2c0e9 100644
--- a/interface/models/payment/payment.yaml
+++ b/interface/models/payment/payment.yaml
@@ -398,7 +398,7 @@ components:
           description: Human-readable operation label.
           type: string
         operationRef:
-          description: External operation reference identifier reported by the gateway.
+          description: Internal operation reference identifier reported by the gateway.
           type: string
         gateway:
           description: Gateway microservice type handling the operation.