BR-DE-21
Validation message
Explanation
The CustomizationID (BT-24) must syntactically match the XRechnung specification identifier — starting with 'urn:cen.eu:en16931:2017#compliant#urn:xeinkauf.de:kosit:xrechnung_3.0'.
How to fix
Set the CustomizationID to the correct XRechnung URN.
Applies to
- XRechnung (UBL)
- XRechnung (CII)