Validation rules

BR-22

An invoice line has no invoiced quantity (BT-129).

Rule: BR-22 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-129 — Invoiced quantity
Field in your JSON: invoice.lines[*].qty
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

The request schema requires line.qty on every line.

How to fix it

Add cbc:InvoicedQuantity to the line.

BR-22 auf Deutsch — was bedeutet der Fehler?

Eine Rechnungsposition hat keine abgerechnete Menge (BT-129).

So beheben Sie den Fehler

Ergänzen Sie cbc:InvoicedQuantity 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.

Or try it live: drop any XRechnung XML on the free validator — same KoSIT-backed report, no account.