# BT-57 — Buyer contact telephone number

> https://billhorse.com/en/terms/bt-57/

Phone number of the buyer's contact point. No format is enforced; international notation is still a good idea.

## Where does it live in the XML?

- UBL: `cac:AccountingCustomerParty/cac:Party/cac:Contact/cbc:Telephone`
- CII: `rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeAgreement/ram:BuyerTradeParty/ram:DefinedTradeContact/ram:TelephoneUniversalCommunication/ram:CompleteNumber`