BR-22
EN 16931
FATAL
This is a mandatory field rule: the business term referenced below must be present in every invoice, and it is missing (or empty) in yours.
How to fix it
- Add the element for the business term (BT) named in the rule text.
- An empty element does not count - the field must carry a value.
- Check you placed it at the correct level (document, party, or line).
Official rule text
Each Invoice line (BG-25) shall have an Invoiced quantity (BT-129).
Developers also reach this page searching for an “invoice validation error”, an “e-invoice rejected” message, or how to fix a failed EN 16931 compliance check — it's the same issue, explained above.
Fix it faster
Paste your invoice XML in our free validator - every finding comes with its rule ID. Then generate, convert and render compliant invoices through one API.