Validation rules
UBL-SR-51
An address carries more than one cac:AddressLine — only one additional address line (line 3) is allowed per postal address.
- Rule
UBL-SR-51— 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 normbill address model has no third address line; generated addresses never contain cac:AddressLine.
How to fix it
Keep at most one AddressLine per address; the first two lines belong in cbc:StreetName and cbc:AdditionalStreetName.
UBL-SR-51 auf Deutsch — was bedeutet der Fehler?
Der KoSIT-Validator lehnt die Rechnung ab, weil eine Anschrift mehrere cac:AddressLine-Elemente trägt — nur eine zusätzliche Adresszeile (Zeile 3) je Anschrift ist erlaubt.
So beheben Sie den Fehler
Behalten Sie höchstens eine AddressLine je Anschrift; die ersten beiden Zeilen gehören in cbc:StreetName und cbc:AdditionalStreetName.
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.