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Warning

UBL-CR-439: A separate payer party in a direct debit mandate is not used

In short

Warning: worth checking.

UBL-CR-439 means cac:PaymentMeans/cac:PaymentMandate in your UBL invoice or credit note contains a payer-party block (cac:PayerParty), which EN 16931 does not use. Remove this block, export again and recheck the file. The rule does not require the payer to be the buyer.

On this page

What it means

This rule checks for cac:PayerParty within cac:PaymentMeans/cac:PaymentMandate in a UBL invoice or credit note. It does not compare the payer with the buyer (BG-7). The account to be debited (BT-91) is represented separately in cac:PayerFinancialAccount/cbc:ID within the mandate.

Why it matters

EN 16931 does not use a separate payer-party block within the payment mandate. This rule checks the presence of that block, not the payer's identity.

How to fix it

Delete cac:PayerParty from cac:PaymentMeans/cac:PaymentMandate. Do not change the buyer details solely because this warning appears. The account to be debited (BT-91) belongs in cac:PayerFinancialAccount/cbc:ID within the mandate, including when it belongs to another party. Export again and 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 PayerParty

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-439 still fails, and which other rules do.

Updated 6 November 2026