Validation rules

BR-DEX-09 — XRechnung rule

In the Extension, the amount due (BT-115) must equal total with VAT (BT-112) − paid (BT-113) + rounding (BT-114) + the sum of third-party payment amounts.

Rule: BR-DEX-09 — official EN 16931 / XRechnung rule
Severity: error
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Only reachable when validating your own XML — normbill-generated documents cannot trigger it

Belongs to the 'Extension XRechnung' CustomizationID. normbill generates the plain CIUS, never the Extension — reachable only for Extension XML submitted to /v1/invoices/validate.

How to fix it

Recompute the payable amount including third-party payments.

BR-DEX-09 auf Deutsch — was bedeutet der Fehler?

In der Extension gilt: fälliger Betrag (BT-115) = Gesamtbetrag mit USt (BT-112) − gezahlt (BT-113) + Rundung (BT-114) + Summe der Fremdforderungsbeträge. Diese Regel gehört zur „Extension XRechnung“; normbill erzeugt die reguläre CIUS.

So beheben Sie den Fehler

Berechnen Sie den fälligen Betrag inklusive Fremdforderungen neu.

Related rules

BR-DEX-08 — A delivery location identifier scheme in the Extension must come from the ISO 6523 ICD list.
BR-DEX-10 — A third-party payment group must state the payment type.
BR-DEX-07 — An endpoint identifier scheme in the Extension must come from the EAS code list (extended by the DiGA codes…
BR-DEX-11 — A third-party payment group must state the payment amount.
BR-DEX-06 — A scheme identifier in the Extension must come from the ISO 6523 ICD list.
BR-DEX-12 — A third-party payment group must state the payment description.

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.