Validation rules

BR-DE-9 — XRechnung rule

Buyer postal code (BT-53) is missing.

Rule: BR-DE-9 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-53 — Buyer postal code
Field in your JSON: invoice.buyer.address.postal_code

How to fix it

Set invoice.buyer.address.postal_code.

BR-DE-9 auf Deutsch — was bedeutet der Fehler?

Die Postleitzahl des Käufers (BT-53) fehlt in der Anschrift.

So beheben Sie den Fehler

Setzen Sie invoice.buyer.address.postal_code.

Related rules

BR-DE-8 — Buyer city (BT-52) is missing.
BR-DE-10 — A deliver-to address (BG-15) is present but its city (BT-77) is missing — XRechnung requires it.
BR-DE-7 — Seller contact email (BT-43) is missing.
BR-DE-11 — A deliver-to address (BG-15) is present but its post code (BT-78) is missing — XRechnung requires it.
BR-DE-6 — Seller contact phone number (BT-42) is missing.
BR-DE-5 — Seller contact name (BT-41) 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.