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Warning

UBL-CR-253: Leave the identifier of the buyer's contact out

In short

Warning: worth checking.

UBL-CR-253 means the buyer's contact block includes an identifier (cbc:ID), which EN 16931 does not use. Remove that identifier and keep any existing contact name, telephone number and email address.

On this page

What it means

This rule checks the buyer's contact block in a UBL invoice or credit note (cac:AccountingCustomerParty, cac:Party, cac:Contact). It must not contain cbc:ID, a code that identifies the contact. The standard allows the buyer's contact point (BT-56), telephone number (BT-57) and email address (BT-58) there.

Why it matters

The rule checks for the identifier inside the buyer's contact block, not identifiers elsewhere in the buyer's details. You do not need to remove the other contact fields to address this warning.

How to fix it

Configure your UBL export to omit the identifier from the buyer's contact block. Keep any existing contact name, telephone number and email address. If you edit or generate the XML, remove cbc:ID from cac:AccountingCustomerParty/cac:Party/cac:Contact. Recheck the file in Klarbon.

Once the file is corrected, check it again for free: Validate an invoice against EN 16931

Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice

The rule as published

A UBL invoice should not include the AccountingCustomerParty Party Contact ID

Where this rule applies

Rule set Version
EN 16931 (UBL) 1.3.17
EN 16931 (UBL credit note) 1.3.17
XRechnung 3.0 (UBL) 3.0.2
XRechnung 3.0 (UBL credit note) 3.0.2
Peppol BIS Billing 3.0 (invoice) 2026.5
Peppol BIS Billing 3.0 (credit note) 2026.5
SI-UBL 2.0 / NLCIUS (invoice) 2.0.3.13
SI-UBL 2.0 / NLCIUS (credit note) 2.0.3.13
France CTC (UBL invoice) 1.4.0-04
France CTC (UBL credit note) 1.4.0-04
CIUS-RO UBL Invoice 1.0.9 1.0.9
CIUS-RO UBL Credit Note 1.0.9 1.0.9
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether UBL-CR-253 still fails, and which other rules do.

Updated 6 November 2026