Validation rules
BR-24
An invoice line has no line net amount (BT-131).
- Rule
BR-24— official EN 16931 / XRechnung rule- Severity
- error
- Business term
BT-131— Line net amount- Field in your JSON
invoice.lines[*]- Detected by
- tier 3 — KoSIT validator (authoritative)
- Reachability
- Only reachable when validating your own XML — normbill-generated documents cannot trigger it
The engine computes BT-131 for every line (qty × unit_price, adjusted by line allowances/charges). The UBL schema makes the element mandatory anyway, so the XSD tier reports hand-built XML without it first.
How to fix it
Add cbc:LineExtensionAmount to the line.
BR-24 auf Deutsch — was bedeutet der Fehler?
Eine Rechnungsposition hat keinen Positionsnettobetrag (BT-131).
So beheben Sie den Fehler
Ergänzen Sie cbc:LineExtensionAmount in der Position.
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.