Solution : https://service.sap.com/sap/support/notes/122264 (SAP Service marketplace login required)
Key words :
additional key words, symptom billing item, payment clearing referring, currency key, milestone billing, final billing, payment request, payment dates, currency keys, prerequisites preconditions
Related Notes :
| 123690 | Alloc. down paym.request instead of dwn paym. made |
| 113347 | Down payment process. as of Release 4.0x (standard) |