Validation rules
BR-07
The buyer name (BT-44) is missing or empty.
- Rule
BR-07— official EN 16931 / XRechnung rule- Severity
- error
- Business term
BT-44— Buyer name- Field in your JSON
invoice.buyer.name- 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.buyer.name, so generated documents always carry BT-44.
How to fix it
Provide cac:PartyLegalEntity/cbc:RegistrationName on the customer party.
BR-07 auf Deutsch — was bedeutet der Fehler?
Der Name des Käufers (BT-44) fehlt oder ist leer.
So beheben Sie den Fehler
Hinterlegen Sie cac:PartyLegalEntity/cbc:RegistrationName bei der Käuferpartei.
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.
Or try it live: drop any XRechnung XML on the free validator — same KoSIT-backed report, no account.