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Warning

UBL-CR-648: The specification identifier should have no scheme attribute

In short

Warning: worth checking.

UBL-CR-648 means the specification identifier (BT-24) has a schemeID attribute, which EN 16931 does not use. Remove the attribute and keep the identifier text.

On this page

What it means

This rule checks the specification identifier (BT-24), the cbc:CustomizationID element, and flags it if it carries a schemeID attribute. The identifier is a plain text value, such as urn:cen.eu:en16931:2017, and EN 16931 defines no scheme for it. The rule checks only the attribute, not the identifier text.

Why it matters

EN 16931 uses the specification identifier without a schemeID attribute. This warning concerns that extra attribute, not the identifier text.

How to fix it

Remove schemeID from cbc:CustomizationID and keep the specification identifier (BT-24) text unchanged. If your software adds the attribute, ask its supplier to correct the export, then check the new file again.

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 CustomizationID scheme identifier

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-648 still fails, and which other rules do.

Updated 6 November 2026