# BT-25 — Preceding invoice reference

> https://billhorse.com/en/terms/bt-25/

Number of an earlier invoice this document refers to — typical for credit notes and corrective invoices.

## Where does it live in the XML?

- UBL: `cac:BillingReference/cac:InvoiceDocumentReference/cbc:ID`
- CII: `rsm:SupplyChainTradeTransaction/ram:ApplicableHeaderTradeSettlement/ram:InvoiceReferencedDocument/ram:IssuerAssignedID`