Solution : https://service.sap.com/sap/support/notes/659366 (SAP Service marketplace login required)
Key words : 
faq note 684329this enhancement, hr support packages 46b, minimal minimal sp, 26we highly recommend, 25we highly recommend, product management team, hr support package, uploading/downloading files, send test files, status handler tables
Related Notes : 
       
| 847090 | DMFA Update: Justification field in section Natural Person | 
| 811157 | Update DMFA: CUNP block causes blocking error | 
| 775344 | DMFA Update: CUNP not recalculated | 
| 774256 | DMFA Update: Worker records update version numbers outdated | 
| 771129 | Update DMFA: Net Owed amount should not appear in XML! | 
| 770988 | Update DMFA: name of file | 
| 768713 | DMFA-B2A: Deactivate automatic generation of receipt file | 
| 757074 | DMFA: Cannot upload a notification file | 
| 756073 | DMFA: Include structure for deductions details -> user exit | 
| 755841 | DMFA: B2A user exit for setting Sender | 
| 755160 | Update declaration: PID files are not updated in T5F99SR | 
| 685669 | Delivery of Status Handler | 
| 684329 | FAQ: DMFA Update | 
| 572286 | FAQ: DMFA | 
| 520716 | DMFA 2003 project |