Validation rules

BR-44 — EN 16931 rule

A line-level charge must state what it is for (BT-144/BT-145).

Rule: BR-44 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-144

How to fix it

Set the charge's reason (e.g. "Expresszuschlag") or a UNCL 7161 reason_code.

BR-44 auf Deutsch — was bedeutet der Fehler?

Ein Zuschlag auf Positionsebene muss benannt werden (BT-144 Freitext oder BT-145 Code).

So beheben Sie den Fehler

Setzen Sie reason (z. B. "Expresszuschlag") oder einen reason_code aus der Codeliste UNCL 7161.

Related rules

BR-CO-24 — An invoice line charge (BG-28) carries neither a reason text (BT-144) nor a reason code (BT-145) — at least…
BR-43 — An invoice line charge (BG-28) has no charge amount (BT-141).
BR-45 — A VAT breakdown (BG-23) has no taxable amount (BT-116).
BR-42 — A line-level allowance must state why it is granted (BT-139/BT-140).
BR-46 — A VAT breakdown (BG-23) has no tax amount (BT-117).
BR-41 — An invoice line allowance (BG-27) has no allowance amount (BT-136).

Official sources

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.