Validation rules

NB-EADDR-SELLER — normbill pre-flight check

Seller electronic address (BT-34) is missing — XRechnung requires one for both parties.

Rule: NB-EADDR-SELLER — normbill pre-flight check (no single official rule id applies)
Severity: error
Business term: BT-34 — Seller electronic address
Field in your JSON: invoice.seller.electronic_address

How to fix it

Set invoice.seller.electronic_address, or invoice.seller.contact.email (used as the electronic address).

NB-EADDR-SELLER auf Deutsch — was bedeutet der Fehler?

Die elektronische Adresse des Verkäufers (BT-34) fehlt — die XRechnung verlangt sie für beide Parteien.

So beheben Sie den Fehler

Setzen Sie invoice.seller.electronic_address — oder invoice.seller.contact.email (wird dann als elektronische Adresse verwendet).

NB-* checks run before generation to catch problems the official rule set would only report indirectly. The authoritative KoSIT validation still has the final word on conformance.

Related rules

BR-62 — The seller electronic address (BT-34) has no scheme identifier.
PEPPOL-EN16931-R020 — The seller electronic address (BT-34) must be provided.

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.