BR-DE-2
The invoice must contain the "SELLER CONTACT" group (BG-6) — a seller contact person with contact details. XRechnung requires it always, including B2B.
- Severity
- Error
- Applies to
- CII, UBL
- Rule set
- v2026-01-31
Official rule text
Die Gruppe "SELLER CONTACT" (BG-6) muss übermittelt werden.
Why it happens
Invoice templates usually carry contact details only in the letterhead. When mapping to the structured format the contact group is dropped entirely, because the internal data model has no mandatory field for it.
How to fix it
Send BG-6 with contact point (BT-41), telephone (BT-42) and email (BT-43). In UBL that is cac:AccountingSupplierParty/cac:Party/cac:Contact, in CII ram:SellerTradeParty/ram:DefinedTradeContact.
NormAPI provides technical validation, not tax or legal advice.