Validation rules

BR-09 — EN 16931 rule

The seller address has no country code (BT-40).

Rule: BR-09 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-40 — Seller country
Field in your JSON: invoice.seller.address.country
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

invoice.seller.address.country is required by the request schema.

How to fix it

Add cac:Country/cbc:IdentificationCode with an ISO 3166-1 alpha-2 code to the supplier postal address.

BR-09 auf Deutsch — was bedeutet der Fehler?

In der Verkäuferanschrift fehlt der Ländercode (BT-40).

So beheben Sie den Fehler

Ergänzen Sie cac:Country/cbc:IdentificationCode mit einem ISO-3166-1-Alpha-2-Code in der Verkäuferanschrift.

Related rules

BR-08 — The seller postal address (BG-5) is missing.
BR-10 — The buyer postal address (BG-8) is missing.
BR-07 — The buyer name (BT-44) is missing or empty.
BR-11 — The buyer address has no country code (BT-55).
BR-06 — The seller name (BT-27) is missing or empty.
BR-12 — The sum of invoice line net amounts (BT-106) is missing from the document totals.

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.