BR-21
Validation message
Explanation
Every invoice line needs an identifier, usually a running number (1, 2, 3 …). It lets both sides refer to a line unambiguously in queries or corrections.
How to fix
Ask the seller for a corrected invoice in which every line has a number. When it is missing, the seller's invoicing software is usually the cause.
Applies to
- EN 16931 (UBL)
- EN 16931 (CII)