# BT-43 — Seller contact email address

> https://billhorse.com/en/terms/bt-43/

E-mail address of the seller contact. Mandatory in XRechnung (BR-DE-7).

## Where does it live in the XML?

- UBL: `cac:AccountingSupplierParty/cac:Party/cac:Contact/cbc:ElectronicMail`
- CII: `rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:SellerTradeParty/ram:DefinedTradeContact/ram:EmailURIUniversalCommunication/ram:URIID`

## Checked by these rules

- [BR-DE-7 — Contact e-mail missing (XRechnung)](https://billhorse.com/en/rules/br-de-7/)