Message SAP WS121 - Documents exist referencing & and date & for invoicing party &

System Response
The system refers you to a possible double entry of the same invoicedocument, and thus a possible double payment.

Procedure
The current document can be posted despite this message. If you want toavoid a possible double entry:

  • Check whether the current document has already been entered in the
  • system.
    • If necessary, check that your entry (reference number) is correct.