Solution : https://service.sap.com/sap/support/notes/446845 (SAP Service marketplace login required)
Key words : 
relevant company code, negative indicator reason, negative posting, negative postings, intercompany billing, financial accounting, terms xnegp, xaccit-negpcancellation, prerequisites prerequisites, billing type
Related Notes : 
       
| 1503853 | |
| 1471299 | |
| 352689 | |
| 153555 | Invoice reference f.credit memos w.negative posting |