Validation rules

BR-18 — EN 16931 rule

A seller tax representative (BG-11) must state the representative's name (BT-62).

Rule: BR-18 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-62
Detected by: tier 3 — KoSIT validator (authoritative)
Reachability: Not expressible through the normbill invoice model — documented for completeness

The normbill invoice model has no tax representative party (BG-11).

How to fix it

Add cac:PartyName/cbc:Name to cac:TaxRepresentativeParty.

BR-18 auf Deutsch — was bedeutet der Fehler?

Ein Steuervertreter des Verkäufers (BG-11) ist angegeben, aber sein Name (BT-62) fehlt.

So beheben Sie den Fehler

Ergänzen Sie cac:PartyName/cbc:Name in cac:TaxRepresentativeParty.

Related rules

BR-17 — A payee (BG-10) that differs from the seller must state the payee name (BT-59).
BR-19 — A seller tax representative (BG-11) must carry a postal address (BG-12).
BR-16 — The invoice has no invoice lines (BG-25) — at least one is required.
BR-20 — The tax representative's postal address must contain a country code (BT-69).
BR-15 — The amount due for payment (BT-115) is missing from the document totals.
BR-21 — An invoice line has no line identifier (BT-126).

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.