BR-03
EN 16931
FATAL
Every invoice must carry an Issue date (BT-2, cbc:IssueDate) in the format YYYY-MM-DD.
How to fix it
- Add
cbc:IssueDate, e.g.2026-08-06. - Use the XML date format exactly - no time part, no timezone, no
06/08/2026.
Official rule text
An Invoice shall have an Invoice issue date (BT-2).
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.
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