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Warning

UBL-CR-576: The seller's item number should not have an extended ID

In short

Warning: worth checking.

UBL-CR-576 means the seller's item identification on an invoice or credit note line contains an extended ID (cbc:ExtendedID), which EN 16931 does not use. It is a warning. Remove the extended ID and keep the seller's item number (BT-155) in cbc:ID.

On this page

What it means

The check looks for cbc:ExtendedID inside cac:Item/cac:SellersItemIdentification on every cac:InvoiceLine or cac:CreditNoteLine. The element should be absent, even if cbc:ID is missing or cbc:ExtendedID is empty. The seller's item number (BT-155) goes in cbc:ID inside cac:SellersItemIdentification.

Why it matters

The EN 16931 UBL rules do not use an extended identifier inside the seller's item identification.

How to fix it

Remove cbc:ExtendedID from cac:Item/cac:SellersItemIdentification on every invoice or credit note line. Keep the correct seller's item number (BT-155) in cbc:ID rather than automatically appending the extension. If you need the extra information, put it in the item description instead. 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 InvoiceLine Item SellersItemIdentification ExtendedID

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-576 still fails, and which other rules do.

Updated 6 November 2026