Validation rules

BR-57 — EN 16931 rule

A deliver-to address (BG-15) must contain a country code (BT-80).

Rule: BR-57 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-80 — Deliver-to country code
Field in your JSON: invoice.delivery_address.country
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Not expressible through the normbill invoice model — documented for completeness

The normbill invoice model carries only the delivery date (BT-72), not a deliver-to address (BG-15).

How to fix it

Add cac:Country/cbc:IdentificationCode to the delivery address.

BR-57 auf Deutsch — was bedeutet der Fehler?

Eine Lieferanschrift (BG-15) muss einen Ländercode (BT-80) enthalten.

So beheben Sie den Fehler

Ergänzen Sie cac:Country/cbc:IdentificationCode in der Lieferanschrift.

Related rules

BR-IC-12 — An intra-community supply (VAT category K) must state the deliver-to country (BT-80).
BR-56 — A seller tax representative (BG-11) must carry the representative's VAT identifier (BT-63).
BR-55 — A preceding-invoice reference (BG-3) is present but the preceding invoice number (BT-25) is missing.
BR-54 — An item attribute (BG-32) must carry both a name (BT-160) and a value (BT-161).
BR-53 — A VAT accounting currency (BT-6) is given, so the VAT total in that currency (BT-111) must be present as well.
BR-61 — The payment means is a credit transfer (code 30 or 58), so a payment account identifier (IBAN, BT-84) is…

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.