errorformatUBL 2.1

`UBL-CR-622`:A UBL invoice should not include the InvoiceLine Item ItemInstance

Fix: Invoice Navigator automatically removes the disallowed `cac:ItemInstance` element from your Invoice. Upload your invoice to fix this automatically.

UBL 2.1 Invoice schema does not include `cac:Item/cac:ItemInstance`. This element must be removed for EN 16931 compliance.

Severity

Fatal

Rule set

UBL 2.1

Country

All EU

Fix type

AUTO-FIX

Confidence

95%

Engine Classification

Remove disallowed UBL element per EN16931 specification

Confidence: 95% · Applied automatically in pipeline

What is UBL-CR-622?

UBL-CR-622 is a fatal validation rule defined in the UBL 2.1 specification. It validates the ItemInstance element under InvoiceLine > Item in the UBL invoice XML.

When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.

Target path: /Invoice/cac:InvoiceLine/cac:Item/cac:ItemInstance

Fix this error

Why This Error Matters

Invoice will be rejected by EN16931 validators. These conformance rules prohibit UBL elements that are not part of the EN16931 e-invoicing profile. Remove the disallowed element.

UBL-CR-622 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.

Invoice Navigator can automatically correct this error in your pipeline. The fix is applied with full audit evidence, so your compliance trail remains intact.

Validator Behavior

·Causes invoice rejection
·Fails UBL schema validation
·Error returned: UBL-CR-622
·Specification: UBL 2.1

How to Fix It

Locate the disallowed element

Open your invoice XML and find cac:ItemInstance at /Invoice/cac:InvoiceLine/cac:Item/cac:ItemInstance. This element is not permitted in the target e-invoice profile and triggers UBL-CR-622.

Remove cac:ItemInstance

Delete the entire cac:ItemInstance block and its child elements. Invoice Navigator automatically removes the disallowed `cac:ItemInstance` element from your Invoice.

Re-validate your invoice

Upload the corrected invoice to confirm UBL-CR-622 is resolved. If your software consistently adds this element, contact your vendor about their e-invoice export settings.

Before / After

Failing XML

<cac:Item>
  <cac:ItemInstance>value</cac:ItemInstance>
</cac:Item>

Corrected XML

<cac:Item>
  <!-- cac:ItemInstance removed for EN 16931 compliance -->
</cac:Item>

Technical Reference

XPath/Invoice/cac:InvoiceLine/cac:Item/cac:ItemInstance

SpecUBL 2.1

Operationremove

StrategyRemove disallowed UBL element per EN16931 specification

Common Causes

·Invoice line item contains ItemInstance
·Item ItemInstance not in EN16931 profile
·Serial/lot/instance tracking not permitted
·Instance-level data not needed in e-invoice
·ERP exports serialization or lot information

Seeing this in production? The API handles UBL-CR-622 automatically. See the fix response →

Frequently Asked Questions

UBL 2.1 Invoice schema does not include `cac:Item/cac:ItemInstance`. This element must be removed for EN 16931 compliance.

Invoice Navigator automatically removes the disallowed `cac:ItemInstance` element from your Invoice. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Yes, UBL-CR-622 is a critical error that will cause invoice rejection. It must be fixed before submission.

Many instances of UBL-CR-622 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

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UBL-CR-622:A UBL invoice should not include the InvoiceLine Item ItemInstance