Solution : https://service.sap.com/sap/support/notes/1372609 (SAP Service marketplace login required)
Key words :
fi document numbers, fi document number, attached correction instructions, park accounting documents, reference transaction bkpff, accounting interface, awtyp 'bkpff', ac interface, calling application, assigned internally
Related Notes :
1367683 | IOA: multiple parked interest documents of one invoice |
1282005 | Parking using the accounting interface |