Validation rules
BR-03
The issue date (BT-2) is missing or empty.
- Rule
BR-03— official EN 16931 / XRechnung rule- Severity
- error
- Business term
BT-2— Issue date- Field in your JSON
invoice.issue_date- Detected by
- tier 3 — KoSIT validator (authoritative)
- Reachability
- Only reachable when validating your own XML — normbill-generated documents cannot trigger it
The request schema requires invoice.issue_date. Hand-built XML without a parseable date is already rejected by the XML schema (xs:date), so the XSD tier usually reports this first.
How to fix it
Set cbc:IssueDate to a calendar date in YYYY-MM-DD format.
BR-03 auf Deutsch — was bedeutet der Fehler?
Das Rechnungsdatum (BT-2) fehlt oder ist leer.
So beheben Sie den Fehler
Setzen Sie cbc:IssueDate auf ein Kalenderdatum im Format JJJJ-MM-TT.
Official sources
- XRechnung specification (KoSIT / xeinkauf.de)
- KoSIT validator on GitHub and the XRechnung validator configuration
Every 422 from the API lists the rule id, the path in your request JSON, a plain-language message and a suggested fix — see the docs overview for the report format.