Validation rules
UBL-SR-33
A supporting document (BG-24) carries more than one description (BT-123) — only one cbc:DocumentDescription per cac:AdditionalDocumentReference is allowed.
- Rule
UBL-SR-33— 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
The serializer emits at most one DocumentDescription per supporting document, from invoice.supporting_documents[i].description.
How to fix it
Keep a single DocumentDescription per AdditionalDocumentReference.
UBL-SR-33 auf Deutsch — was bedeutet der Fehler?
Der KoSIT-Validator lehnt die Rechnung ab, weil eine rechnungsbegründende Unterlage (BG-24) mehrere Beschreibungen (BT-123) trägt — nur eine cbc:DocumentDescription je AdditionalDocumentReference ist erlaubt.
So beheben Sie den Fehler
Behalten Sie genau eine DocumentDescription je AdditionalDocumentReference.
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.