Validation rules

BR-DE-6 — XRechnung rule

Seller contact phone number (BT-42) is missing.

Rule: BR-DE-6 — official EN 16931 / XRechnung rule
Severity: error
Business term: BT-42 — Seller contact phone
Field in your JSON: invoice.seller.contact.phone

How to fix it

Set invoice.seller.contact.phone.

BR-DE-6 auf Deutsch — was bedeutet der Fehler?

Die Telefonnummer der Ansprechperson beim Verkäufer (BT-42) fehlt.

So beheben Sie den Fehler

Setzen Sie invoice.seller.contact.phone.

Related rules

BR-DE-27 — The seller contact phone number (BT-42) should contain at least three digits.
BR-DE-5 — Seller contact name (BT-41) is missing.
BR-DE-7 — Seller contact email (BT-43) is missing.
BR-DE-4 — Seller postal code (BT-38) is missing.
BR-DE-8 — Buyer city (BT-52) is missing.
BR-DE-3 — Seller city (BT-37) is missing.

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.