diff --git a/accountAPI.yaml b/accountAPI.yaml
index 35a455b..a8a06aa 100644
--- a/accountAPI.yaml
+++ b/accountAPI.yaml
@@ -1189,7 +1189,7 @@ components:
           $ref: '#/components/schemas/PaymentIbanAccount'
         creationDateTime:
           $ref: '#/components/schemas/DateTime'
-          description: Date and time when the message was created.
+          description: Date and time when the message was created. Corresponds to the attribute _GrpHdr ⇾ CreDtTm_ in SPS/ISO-20022.
 
     Iso20022ReportReference052:
       title: ISO20022 Report Reference (camt.052)