Field help (FCTDEL) 

Cancellation of receipts

This procedure is used to cancel a receipt by deleting the receipt number of invoices and due dates. The receipt must not have been posted.
The process resets the FCTVCR field in the SINVOICE tables (invoices) and GACCDUDATE (due dates).

By default, after entering the factor code, the most recent (non posted) receipt number is suggested.
The 'Log file' option is used to list invoices and/or credit memos on which the cancellation has has an impact.