# EHF-REMINDER-B02101

Source: https://xmlvalid.com/rules/EHF-REMINDER-B02101

> Attribute 'schemeID' MUST be present.

- Level: error
- Rule sets: EHF Reminder 3.0 rules (Norway) release 2026-09-29
- Context: `/ubl:Invoice/cac:AccountingSupplierParty/cac:Party/cbc:EndpointID`
- Test: `@schemeID`

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