# EHF-REMINDER-B01901

Source: https://xmlvalid.com/rules/EHF-REMINDER-B01901

> Element 'cac:Party' MUST be provided.

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

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