Validation rules

BR-DEX-12

A third-party payment group must state the payment description.

Rule: BR-DEX-12 — official EN 16931 / XRechnung rule
Severity: error
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

Belongs to the 'Extension XRechnung' CustomizationID. normbill generates the plain CIUS, never the Extension — reachable only for Extension XML submitted to /v1/invoices/validate.

How to fix it

Add the third-party payment description.

BR-DEX-12 auf Deutsch — was bedeutet der Fehler?

Eine Fremdforderungsgruppe muss die Beschreibung nennen. Diese Regel gehört zur „Extension XRechnung“; normbill erzeugt die reguläre CIUS.

So beheben Sie den Fehler

Ergänzen Sie die Beschreibung der Fremdforderung.

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.