Assignment field (ZUONR) in partial payment customer
We have an issue concerning the assignment field in the partial payment from a customer.
In the assignment field (ZUONR) we normally have the invoice numbers from another application (via interface to SAP).
When we receive a partial payment from a customer via bank statement (MT940 EBS file), we get a payment advice in FEBAN. on the correct invoice. It is not booked because the difference is too large. That is correct!
Our debtor department delete the payment advice and the use post item (in FEBAN) to create a partial payment (via FB05).
Instead of the assignment from the invoice document, SAP puts another number in ZUONR for the first posting area. Afetr investigation it seems like it is a part of the payment advice number!?
When we manually create a partial payment (without first having a payment advice from EBS), we get the (actual) date in ZUONR.
In the screenprints attached, it is shown.
In the attachment BSEG part 1 and BSEG part 2, the assigment fields with their values are visible as result of FB05 from post item in FEBAN.
For those items there was a payment advice, which is deleted (first). Assignment (ZUONR) is a "strange" value, part of payment advice number!?
BSEG part 3 and BSEG part 4, the items are shown when partial payment is manually entered (via FB05) without payment advice via EBS in FEBAN. Then a date is filled in assignment (ZUONR) field.
Is it possible to arrange that the assignment field (ZUONR) gets the value of the original invoice, on which the partial payment is created?
Is that possible with customizing?