InvoiceGlass

Extra UBL field “Issue date / Project reference” · UBL-CR-135

  • Severity · Warning
  • Applies to · UBL
  • Editorial review pending

The CEN check flags the XML element cbc:IssueDate in UBL invoices. It checks for issue date under “project reference”.

As of

Who can correct it?

The invoicing software provider can correct the export.

How to fix it

  1. Find the entry in the UBL export at cac:ProjectReference/cbc:IssueDate.
  2. Adjust the export to omit cbc:IssueDate at this location. If you need the information, first check where the selected profile expects it.

Rule text and source

Paraphrase · The test reports a finding as soon as cac:ProjectReference/cbc:IssueDate returns at least one match.

Message to the sender

Hello,

rule UBL-CR-135 was triggered when checking electronic invoice {invoiceNumber}. The validator flagged issue date under “project reference”. Could you check the export and send us a corrected file?

Kind regards

Example

The rule flags cbc:IssueDate under “project reference”. The corrected export omits that element from the affected section.

UBL

cac:ProjectReference/cbc:IssueDate

Fails the rule
<cbc:IssueDate>2026-10-15</cbc:IssueDate>

Corrected
<!-- optional element omitted -->

Rule versions

CEN · EN 16931 (KoSIT) 1.3.16

CEN · EN 16931 1.3.17

Validate a file