Validation rules

BR-DE-9

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.

Official sources

XRechnung specification (KoSIT / xeinkauf.de)
KoSIT validator on GitHub and the XRechnung validator configuration

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.