Validation rules
BR-06
The seller name (BT-27) is missing or empty.
- Rule
BR-06— official EN 16931 / XRechnung rule- Severity
- error
- Business term
BT-27— Seller name- Field in your JSON
invoice.seller.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.seller.name, so generated documents always carry BT-27.
How to fix it
Provide cac:PartyLegalEntity/cbc:RegistrationName on the supplier party.
BR-06 auf Deutsch — was bedeutet der Fehler?
Der Name des Verkäufers (BT-27) fehlt oder ist leer.
So beheben Sie den Fehler
Hinterlegen Sie cac:PartyLegalEntity/cbc:RegistrationName bei der Verkäuferpartei.
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.