# BT-156 — Item buyer's identifier

> https://billhorse.com/en/terms/bt-156/

The item number from the buyer's system, letting the buyer's procurement match the line automatically.

## Where does it live in the XML?

- UBL: `cac:InvoiceLine/cac:Item/cac:BuyersItemIdentification/cbc:ID`
- CII: `ram:SpecifiedTradeProduct/ram:BuyerAssignedID`