# BG-6 — Seller contact

> https://billhorse.com/en/terms/bg-6/

The seller-side contact for questions about the invoice: name or department, phone and e-mail. Optional in EN 16931, but fully mandatory under XRechnung.

## Where does it live in the XML?

- UBL: `cac:AccountingSupplierParty/cac:Party/cac:Contact`
- CII: `ram:SellerTradeParty/ram:DefinedTradeContact`

## Contained fields

- [BT-41 — Seller contact point](https://billhorse.com/en/terms/bt-41/)
- [BT-42 — Seller contact telephone number](https://billhorse.com/en/terms/bt-42/)
- [BT-43 — Seller contact email address](https://billhorse.com/en/terms/bt-43/)

## Checked by these rules

- [BR-DE-2 — Seller contact missing (XRechnung)](https://billhorse.com/en/rules/br-de-2/)
- [BR-DE-5 — Contact name missing (XRechnung)](https://billhorse.com/en/rules/br-de-5/)
- [BR-DE-6 — Contact phone missing (XRechnung)](https://billhorse.com/en/rules/br-de-6/)
- [BR-DE-7 — Contact e-mail missing (XRechnung)](https://billhorse.com/en/rules/br-de-7/)