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Warning

UBL-CR-622: A line should not carry item instance details

In short

Warning: worth checking.

UBL-CR-622 means a line contains cac:ItemInstance for details of a specific unit, which EN 16931 does not use at this location. Remove this group and write any details you need to retain in the line note or item description.

On this page

What it means

This rule checks that the item information on a line (BG-31) has no item instance group (cac:ItemInstance). This group can hold details of a specific unit, such as a serial number, a batch or lot number, or manufacture and best before dates. It looks at every line of the invoice or credit note.

Why it matters

EN 16931 does not use the cac:ItemInstance group in line item information. This does not prohibit recording relevant unit details in other suitable invoice fields.

How to fix it

If you need to retain serial or batch numbers, write them in the invoice line note (BT-127) or item description (BT-154), or include them in a supporting attachment. Delete cac:ItemInstance from cac:Item on every affected invoice line or credit note line. Check the corrected 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 InvoiceLine Item ItemInstance

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-622 still fails, and which other rules do.

Updated 6 November 2026