# PEPPOL-T111-B00105

Source: https://xmlvalid.com/rules/PEPPOL-T111-B00105

> Element 'cac:SenderParty' MUST be provided.

- Level: error
- Rule sets: Peppol Invoice Response rules 3.1
- Context: `/ubl:ApplicationResponse`
- Test: `cac:SenderParty`

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