Validation rules

UBL-SR-26

The payment reference (BT-83) appears more than once in a cac:PaymentMeans — only one cbc:PaymentID per payment means is allowed.

Rule: UBL-SR-26 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-83 — Remittance information
Field in your JSON: invoice.payment.reference
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

The serializer emits at most one PaymentID, from invoice.payment.reference.

How to fix it

Keep a single cbc:PaymentID per cac:PaymentMeans. Through normbill, invoice.payment.reference is a single value.

UBL-SR-26 auf Deutsch — was bedeutet der Fehler?

Der KoSIT-Validator lehnt die Rechnung ab, weil der Verwendungszweck (BT-83) in einem cac:PaymentMeans mehrfach vorkommt — nur eine cbc:PaymentID je Zahlungsweg ist erlaubt.

So beheben Sie den Fehler

Behalten Sie genau eine cbc:PaymentID je cac:PaymentMeans. Über normbill ist invoice.payment.reference ein einzelner Wert.

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.