Validation rules
BR-CO-23
An invoice line allowance (BG-27) carries neither a reason text (BT-139) nor a reason code (BT-140) — at least one is required.
- Rule
BR-CO-23— official EN 16931 / XRechnung rule- Severity
- error
- Business term
BT-139— Line allowance reason- Field in your JSON
invoice.lines[*].allowances- Detected by
- tier 1 — normbill pre-flight (also in the playground)
- Reachability
- Triggerable from your request JSON (generate & validate)
normbill's pre-flight reports the equivalent finding as BR-42 at tier 1.
How to fix it
Set the line allowance's reason or a UNCL 5189 reason_code.
BR-CO-23 auf Deutsch — was bedeutet der Fehler?
Ein Positionsnachlass (BG-27) trägt weder einen Grundtext (BT-139) noch einen Grundcode (BT-140) — mindestens eines ist Pflicht.
So beheben Sie den Fehler
Setzen Sie reason des Positionsnachlasses oder einen UNCL-5189-reason_code. normbill meldet denselben Befund bereits vorab als BR-42.
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.