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Warning

UBL-CR-258: Leave the buyer's agent party out

In short

Warning: worth checking.

UBL-CR-258 means the buyer's party block includes a party acting as the buyer's agent (AgentParty), which EN 16931 does not use. Remove that AgentParty block.

On this page

What it means

This rule checks the buyer's party block in a UBL invoice or credit note (cac:AccountingCustomerParty, cac:Party). It must not contain cac:AgentParty, a nested party description for someone who acts on the buyer's behalf. An EN 16931 invoice names one buyer (BG-7).

Why it matters

The rule excludes the nested agent party from the buyer's party details. It does not determine how you should route the invoice or change who the buyer is.

How to fix it

Configure your UBL export to omit the agent party linked to the buyer. If the export cannot do that, ask your software supplier to change it. If you edit or generate the XML, remove cac:AgentParty from cac:AccountingCustomerParty/cac:Party. Keep the actual buyer's details and 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 AgentParty

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-258 still fails, and which other rules do.

Updated 6 November 2026