BR-CO-23
Error (blocking) EN 16931 (UBL)EN 16931 (CII)
Official rule text
Each Invoice line allowance (BG-27) shall contain an Invoice line allowance reason (BT-139) or an Invoice line allowance reason code (BT-140), or both.
Seeing BR-CO-23 in a rejection?
Run your file through the free validator to see every violation at once — or let NormDrift watch your reference invoices so the next ruleset release never surprises you.