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Warning

UBL-CR-450: Mandate clauses in the XML

In short

Warning: worth checking.

UBL-CR-450 warns that your UBL invoice or credit note includes a clause block (cac:Clause) within a payment mandate. Remove that block from the XML and recheck the file.

On this page

What it means

This rule checks that cac:PaymentMeans/cac:PaymentMandate contains no cac:Clause block. It applies to every such block, including an empty one.

Why it matters

EN 16931 does not use clause blocks within its UBL payment mandate details.

How to fix it

Remove cac:Clause from cac:PaymentMeans/cac:PaymentMandate in the XML export. Keep the mandate reference (BT-89). If a clause also describes the invoice's payment conditions, you can state those conditions in the payment terms text (BT-20). Recheck the file.

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 PaymentMeans PaymentMandate Clause

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-450 still fails, and which other rules do.

Updated 6 November 2026