Validation rules

BR-DE-4 — XRechnung rule

Seller postal code (BT-38) is missing.

Rule: BR-DE-4 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-38 — Seller postal code
Field in your JSON: invoice.seller.address.postal_code

How to fix it

Set invoice.seller.address.postal_code.

BR-DE-4 auf Deutsch — was bedeutet der Fehler?

Die Postleitzahl des Verkäufers (BT-38) fehlt in der Anschrift.

So beheben Sie den Fehler

Setzen Sie invoice.seller.address.postal_code.

Related rules

BR-DE-3 — Seller city (BT-37) is missing.
BR-DE-5 — Seller contact name (BT-41) is missing.
BR-DE-2 — Seller contact details (BG-6) are missing. XRechnung requires a contact person or department.
BR-DE-6 — Seller contact phone number (BT-42) is missing.
BR-DE-1 — Payment instructions (BG-16) are missing. XRechnung requires them.
BR-DE-7 — Seller contact email (BT-43) 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.