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Warning

UBL-CR-336: No contact details for the tax representative

In short

Warning: worth checking.

UBL-CR-336 means the seller's tax representative has contact details (cac:Contact), which EN 16931 does not use for this party. Remove the contact block.

On this page

What it means

EN 16931 has contact details for the seller (BG-6) and the buyer (BG-9), but none for the seller's tax representative (BG-11). The rule flags a cac:Contact under cac:TaxRepresentativeParty, which can hold a contact name, phone number or email address. For the tax representative the standard only has a name, a VAT number and an address. It applies to invoices and credit notes.

Why it matters

EN 16931 does not use a contact block for the seller's tax representative (BG-11).

How to fix it

Leave the tax representative's contact details out of the XML export. If you build the XML yourself, delete cac:Contact from cac:TaxRepresentativeParty. You do not need to move these details to the seller's contact (BG-6) to clear this warning. Recheck the exported 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 TaxRepresentativeParty Contact

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-336 still fails, and which other rules do.

Updated 6 November 2026