Validation rules

BR-07 — EN 16931 rule

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.

Related rules

UBL-SR-15 — The buyer name (BT-44) appears more than once — the customer party may carry only one…
BR-06 — The seller name (BT-27) is missing or empty.
BR-08 — The seller postal address (BG-5) is missing.
BR-05 — The invoice currency code (BT-5) is missing.
BR-09 — The seller address has no country code (BT-40).
BR-04 — The invoice type code (BT-3) is missing.

Official sources

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.