BR-21
Validation message
Explanation
Every invoice line (BG-25) must have a unique identifier (BT-126) — typically a sequential number (1, 2, 3 …). This lets lines be referenced unambiguously in queries or corrections.
How to fix
Set a line identifier (BT-126) on each line.
Applies to
- EN 16931 (UBL)
- EN 16931 (CII)