How do I fix BR-CL-05?

The Tax Currency Code (BT-6) is not a valid ISO 4217 code. If using a different currency for tax accounting, it must be a valid 3-letter code. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Is BR-CL-05 a critical error?

Yes, BR-CL-05 is a critical error that will cause invoice rejection. It must be fixed before submission.

Can BR-CL-05 be automatically fixed?

Many instances of BR-CL-05 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

errorEN 16931

`BR-CL-05`:Tax currency code MUST be coded using ISO code list 4217 alpha-3

The Tax Currency Code (BT-6) is not a valid ISO 4217 code. If using a different currency for tax accounting, it must be a valid 3-letter code.

Severity

Fatal

Rule set

EN 16931

Country

All EU

Fix type

AUTO-FIX

Confidence

85%

Engine Classification

Normalize tax currency code to valid ISO 4217 alpha-3 code

Confidence: 85% · Applied automatically in pipeline

What is BR-CL-05?

BR-CL-05 is a fatal validation rule defined in the EN 16931 specification. It validates the TaxCurrencyCode element 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: /Invoice/cbc:TaxCurrencyCode

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Why This Error Matters

Invoice rejected. Tax reporting currency must be valid for proper VAT accounting.

BR-CL-05 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
·Error returned: BR-CL-05
·Specification: EN 16931

Before / After

Failing XML

<Invoice>
  <cbc:TaxCurrencyCode>INVALID_CODE</cbc:TaxCurrencyCode>
</Invoice>

Corrected XML

<Invoice>
  <cbc:TaxCurrencyCode>VALID_CODE</cbc:TaxCurrencyCode>
</Invoice>

Technical Reference

XPath/Invoice/cbc:TaxCurrencyCode

SpecEN 16931

Operationnormalize

StrategyNormalize tax currency code to valid ISO 4217 alpha-3 code

Common Causes

·Tax currency code not from ISO 4217
·TaxCurrencyCode contains invalid value
·Currency code format incorrect for tax currency
·Obsolete or fictional currency code used
·TaxCurrencyCode confused with country code

Seeing this in production? The API handles BR-CL-05 automatically. See the fix response →

Related Errors

BR-53

VAT amount in accounting currency is missing

Last updated: 27 February 2026

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Handle BR-CL-05 Automatically in Your Pipeline

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

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BR-CL-05:Tax currency code MUST be coded using ISO code list 4217 alpha-3