Validation rules

UBL-SR-27

A cac:PaymentMeans carries more than one cbc:PaymentMeansCode (BT-81) — each payment means states exactly one code.

Rule: UBL-SR-27 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-81 — Payment means code
Field in your JSON: invoice.payment.means_code
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

The serializer emits exactly one PaymentMeansCode, from invoice.payment.means_code.

How to fix it

Keep a single PaymentMeansCode per cac:PaymentMeans.

UBL-SR-27 auf Deutsch — was bedeutet der Fehler?

Der KoSIT-Validator lehnt die Rechnung ab, weil ein cac:PaymentMeans mehrere cbc:PaymentMeansCode (BT-81) trägt — jeder Zahlungsweg nennt genau einen Code.

So beheben Sie den Fehler

Behalten Sie genau einen PaymentMeansCode je cac:PaymentMeans.

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.