# BT-139 — Invoice line allowance reason

> https://billhorse.com/en/terms/bt-139/

Free-text reason for the allowance (e.g. "volume discount"). Every line allowance needs a reason as text (BT-139) or code (BT-140).

## Where does it live in the XML?

- UBL: `cac:InvoiceLine/cac:AllowanceCharge[cbc:ChargeIndicator=false]/cbc:AllowanceChargeReason`
- CII: `ram:SpecifiedTradeAllowanceCharge[ChargeIndicator=false]/ram:Reason`