# ibr-081

Source: https://xmlvalid.com/rules/ibr-081

> The Seller electronic address (ibt-049) MUST be provided.

- Level: error
- Rule sets: PINT Billing rules 1.1.3, PINT Billing rules (as shipped with PINT AE) 1.0.4
- Context: `cac:AccountingSupplierParty/cac:Party`
- Test: `cbc:EndpointID`

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