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Warning

UBL-CR-581: The item on a line should not carry a manufacturer's number

In short

Warning: worth checking.

UBL-CR-581 means the item on an invoice or credit note line contains the manufacturer's item identification (cac:ManufacturersItemIdentification), which EN 16931 does not use. It is a warning. Remove the block, and put the manufacturer's part number in the item description if the buyer needs it.

On this page

What it means

The item on every invoice or credit note line should not contain a cac:ManufacturersItemIdentification block. In UBL it holds the number the manufacturer uses for the product, a part number for example. The check covers the whole block, not only one field in it.

Why it matters

EN 16931 does not use the separate manufacturer's item identification block on invoice or credit note lines.

How to fix it

Leave cac:ManufacturersItemIdentification out of the invoice export without clearing the manufacturer's number from your product records. Add the number to the item description if needed, for example Part no. 4471-B. If you build the XML yourself, delete cac:ManufacturersItemIdentification from cac:Item on each cac:InvoiceLine or cac:CreditNoteLine.

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 ManufacturersItemIdentification

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-581 still fails, and which other rules do.

Updated 6 November 2026