errorpeppol-bis-3

`BR-34`:Invoice line VAT category required

Each invoice line must specify which VAT category applies to that line.

Severity

Fatal

Rule set

peppol-bis-3

Country

All EU

Fix type

INPUT REQUIRED

Engine Classification

Business data required · Explicit input workflow · No assumptions made

Required input: VAT Category Code

What is BR-34?

BR-34 is a fatal validation rule defined in the peppol-bis-3 specification. It validates the ID element under Item > ClassifiedTaxCategory 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: XPath: /Invoice/cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory/cbc:ID

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Why This Error Matters

Line-level VAT category determines how each item is taxed.

BR-34 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
·Rejected by PEPPOL Access Points
·Error returned: BR-34
·Specification: peppol-bis-3

How to Fix It

Add category

S, Z, E, AE, K, G, O, L, or M

Add percent

For category S, include the rate

Add TaxScheme

Always include TaxScheme with ID=VAT

XML Example

Generic example based on the rule's target XPath. Your actual XML structure may differ.

Before

<!-- Missing or empty element triggers cbc:ID error -->
<cbc:ID></cbc:ID>

After

<!-- Provide the required value -->
<cbc:ID>VALID_VALUE</cbc:ID>

Technical Reference

XPathXPath: /Invoice/cac:InvoiceLine/cac:Item/cac:ClassifiedTaxCategory/cbc:ID

Specpeppol-bis-3

Code Example

<cac:Item>
  <cbc:Name>Product Name</cbc:Name>
  <cac:ClassifiedTaxCategory>
    <cbc:ID>S</cbc:ID>
    <cbc:Percent>21</cbc:Percent>
    <cac:TaxScheme>
      <cbc:ID>VAT</cbc:ID>
    </cac:TaxScheme>
  </cac:ClassifiedTaxCategory>
</cac:Item>

Common Causes

·Missing ClassifiedTaxCategory
·Wrong category
·No TaxScheme

Seeing this in production? The API handles BR-34 automatically. See the fix response →

Commonly Seen In

All invoicing software

Frequently Asked Questions

Each invoice line must specify which VAT category applies to that line.

Add ClassifiedTaxCategory with ID to each line item. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.

Yes, BR-34 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.

BR-34 requires specific business data to resolve. Invoice Navigator detects the error and guides you through providing the needed information, then applies the fix with full audit documentation.

BR-34 is commonly seen in exports from All invoicing software. These software packages sometimes generate invoices that need adjustment to meet full compliance standards.

Resolve BR-34 with Guided Input

The compliance engine detects this error and prompts for the required business data before applying a safe, auditable fix.

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BR-34:Invoice line VAT category required