How do I fix BR-AF-09?

Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per EN 16931 (BR-AF-09). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Is BR-AF-09 a critical error?

Yes, BR-AF-09 is a critical error that will cause invoice rejection. It must be fixed before submission.

Can BR-AF-09 be automatically fixed?

Many instances of BR-AF-09 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

errorEN 16931

`BR-AF-09`:The VAT category tax amount for IGIC must equal the taxable amount...

The VAT category tax amount for IGIC must equal the taxable amount multiplied by the IGIC rate. This verifies the tax calculation is mathematically correct.

Severity

Fatal

Rule set

EN 16931

Country

All EU

Fix type

BLOCKED

Engine Classification

Financial or legal field · Modification blocked by policy

Reason: IGIC (Canary Islands) tax rates must be verified against current legislation. Rates vary by product category and require business judgment.

What is BR-AF-09?

BR-AF-09 is a fatal validation rule defined in the EN 16931 specification. It checks whether the vat category tax amount for igic must equal the taxable amount....

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.

This error requires manual correction — financial fields are protected by policy.Test This Error ↓

Why This Error Matters

Invoice will be rejected by validation. IGIC tax amount must be mathematically consistent with taxable amount and rate.

BR-AF-09 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.

Validator Behavior

·Causes invoice rejection
·Error returned: BR-AF-09
·Specification: EN 16931

Before / After

Failing XML

<Invoice>
  <!-- Issue: The VAT category tax amount for IGIC must equal taxable amou -->
</Invoice>

Corrected XML

<Invoice>
  <!-- Issue resolved per EN 16931 -->
</Invoice>

Technical Reference

SpecEN 16931

StrategyBLOCKED: This is a tax calculation mismatch. We cannot determine which value is wrong - the taxable amount, rate, or calculated tax. Source system must verify calculation.

Common Causes

·Tax amount does not equal taxable amount times rate
·Rounding differences in calculation
·Manual tax amount entry does not match calculation
·ERP calculation error
·Rate applied incorrectly

Seeing this in production? The API handles BR-AF-09 automatically. See the fix response →

Handle BR-AF-09 Automatically in Your Pipeline

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

Get API Access View API Documentation

BR-AF-09:The VAT category tax amount for IGIC must equal the taxable amount...