# BR-DEX-12

Source: https://xmlvalid.com/rules/BR-DEX-12

> Das Element "Third party payment description" BT-DEX-003 muss übermittelt werden, wenn die Gruppe "THIRD PARTY PAYMENT" (BG-DEX-09) übermittelt wird.

- Level: error
- Rule sets: XRechnung 3.0 rules (UBL) 2.6.0
- Context: `/ubl:Invoice/cac:PrepaidPayment[$isExtension]`
- Test: `cbc:InstructionID[boolean(normalize-space(xs:string(.)))]`

Validate a document against these rules: https://xmlvalid.com/validate