# PEPPOL-T19-B00106

Source: https://xmlvalid.com/rules/PEPPOL-T19-B00106

> Element 'cac:ProviderParty' MUST be provided.

- Level: error
- Rule sets: Peppol Catalogue rules 3.5
- Context: `/ubl:Catalogue`
- Test: `cac:ProviderParty`

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