UBL-SR-06

Preceding invoice reference shall occur maximum once

error: the document is invalid Peppol documentation ↗

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Context
(/ubl:Invoice|/cn:CreditNote)/cac:BillingReference
Test
(count(cac:InvoiceDocumentReference) <= 1)

Checked with France EXTENDED-CTC-FR (UBL)