How do I fix UBL-CR-678?

Invoice Navigator automatically removes the disallowed `@schemeID` element from your Invoice (UBL-CR-678). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Is UBL-CR-678 a critical error?

Yes, UBL-CR-678 is a critical error that will cause invoice rejection. It must be fixed before submission.

Can UBL-CR-678 be automatically fixed?

Many instances of UBL-CR-678 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

errorUBL 2.1

`UBL-CR-678`:A UBL invoice should not include the TaxCategory/ID schemeID

UBL 2.1 Invoice schema does not include `cac:TaxCategory/cbc:ID/@schemeID`. This element must be removed for EN 16931 compliance.

Severity

Fatal

Rule set

UBL 2.1

Country

All EU

Fix type

AUTO-FIX

Confidence

90%

Engine Classification

Remove disallowed UBL attribute per EN16931 specification

Confidence: 90% · Applied automatically in pipeline

What is UBL-CR-678?

UBL-CR-678 is a fatal validation rule defined in the UBL 2.1 specification. It validates the @schemeID element under ID in the UBL invoice XML.

When this rule fires, the invoice is non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach the buyer.

Target path: //cac:TaxCategory/cbc:ID/@schemeID

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Why This Error Matters

Invoice will be rejected by EN16931 validators. These conformance rules prohibit UBL attributes and elements not in the EN16931 e-invoicing profile. Remove the disallowed attribute or restructure the element.

UBL-CR-678 is a hard failure. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.

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-678
·Specification: UBL 2.1

Before / After

Failing XML

<cbc:ID>
  <@schemeID>value</@schemeID>
</cbc:ID>

Corrected XML

<cbc:ID>
  <!-- @schemeID removed for EN 16931 compliance -->
</cbc:ID>

Technical Reference

XPath//cac:TaxCategory/cbc:ID/@schemeID

SpecUBL 2.1

Operationremove_attribute

StrategyRemove disallowed UBL attribute per EN16931 specification

Common Causes

·TaxCategory ID contains schemeID attribute
·cbc:ID/@schemeID in tax category not permitted
·Scheme identifier on VAT category not in EN16931
·Only plain text tax category code allowed
·ERP exports scheme attribute on tax category ID

Seeing this in production? The API handles UBL-CR-678 automatically. See the fix response →

Handle UBL-CR-678 Automatically in Your Pipeline

The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.

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UBL-CR-678:A UBL invoice should not include the TaxCategory/ID schemeID