# BT-16 — Despatch advice reference

> https://billhorse.com/en/terms/bt-16/

Identifier of the despatch advice (the seller's shipping notice) that the invoice refers to.

## Where does it live in the XML?

- UBL: `cac:DespatchDocumentReference/cbc:ID`
- CII: `rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeDelivery/ram:DespatchAdviceReferencedDocument/ram:IssuerAssignedID`