Validation rules

BR-AF-07 — EN 16931 rule

A document-level charge with VAT category L (IGIC) must have a rate of 0 or greater.

Rule: BR-AF-07 — 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

The request schema requires the charge's vat >= 0, so generated documents always satisfy this.

How to fix it

Set a non-negative Percent on the charge's TaxCategory in your XML.

BR-AF-07 auf Deutsch — was bedeutet der Fehler?

Ein Zuschlag auf Dokumentebene mit der Kategorie L (IGIC) muss einen Steuersatz von 0 oder größer tragen. Generierte Dokumente erfüllen das immer (vat >= 0); die Meldung betrifft extern erzeugtes XML.

So beheben Sie den Fehler

Setzen Sie in Ihrem XML ein nicht-negatives Percent an der TaxCategory des Zuschlags.

Related rules

BR-AF-06 — A document-level allowance with VAT category L (IGIC) must have a rate of 0 or greater.
BR-AF-08 — For each IGIC (L) rate, the taxable amount (BT-116) of the breakdown must equal the sum of line net amounts…
BR-AF-05 — An IGIC (L) line must have a VAT rate (BT-152) of 0 or greater.
BR-AF-09 — The tax amount (BT-117) of an IGIC (L) breakdown must equal its taxable amount (BT-116) multiplied by its…
BR-AF-04 — A document-level charge uses VAT category L (IGIC), which requires the seller VAT identifier (BT-31), the…
BR-AF-10 — An IGIC (L) VAT breakdown must not carry a VAT exemption reason (BT-120) or reason code (BT-121).

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.