# ibr-062

Source: https://xmlvalid.com/rules/ibr-062

> The Seller electronic address (ibt-034) MUST have a Scheme identifier.

- 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/cbc:EndpointID`
- Test: `exists(@schemeID)`

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