# UBL-CR-665

> A UBL invoice should not include the AdditionalDocumentReference ID schemeID unless the DocumentTypeCode equals '130'

Checked against Peppol BIS Billing 3.0 2026.5

Canonical: https://einvoicecheck.eu/rules/ubl-cr-665

## Official rule text

A UBL invoice should not include the AdditionalDocumentReference ID schemeID unless the DocumentTypeCode equals '130'