How do I fix BR-B-01?

Recalculate the value in `cac:InvoiceLine` to match the expected formula. Verify all contributing amounts are correct (BR-B-01). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.

Is BR-B-01 a critical error?

Yes, BR-B-01 is a critical error that will cause invoice rejection. It must be fixed before submission.

Can BR-B-01 be automatically fixed?

Many instances of BR-B-01 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.

errorEN 16931

`BR-B-01`:Split payment requires domestic Italian invoice

Split payment (scissione pagamenti, VAT category B) is only valid for domestic Italian invoices. Both seller and buyer must be in Italy.

Severity

Fatal

Rule set

EN 16931

Country

All EU

Fix type

BLOCKED

Engine Classification

Financial or legal field · Modification blocked by policy

What is BR-B-01?

BR-B-01 is a fatal validation rule defined in the EN 16931 specification. It validates the ID where value is "B". Also check: cac:AccountingSupplierParty and cac:AccountingCustomerParty country codes. element under TaxSubtotal > TaxCategory 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: cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:ID where value is "B". Also check: cac:AccountingSupplierParty and cac:AccountingCustomerParty country codes.

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

Why This Error Matters

Invoice will be rejected. Italian split payment (scissione dei pagamenti) has strict rules for domestic public sector invoices.

BR-B-01 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-B-01
·Specification: EN 16931

How to Fix It

Check seller country

Verify seller postal address country is IT (Italy)

Check buyer country

Verify buyer postal address country is IT (Italy)

Change VAT category if needed

If not domestic Italian, use standard VAT category (S) instead of split payment (B)

Before / After

Failing XML

<Invoice>
  <cac:InvoiceLine>999.99</cac:InvoiceLine>
  <!-- Does not match expected calculation -->
</Invoice>

Corrected XML

<Invoice>
  <cac:InvoiceLine>100.00</cac:InvoiceLine>
  <!-- Matches expected calculation -->
</Invoice>

Technical Reference

XPath

XPath: cac:TaxTotal/cac:TaxSubtotal/cac:TaxCategory/cbc:ID where value is "B". Also check: cac:AccountingSupplierParty and cac:AccountingCustomerParty country codes.

SpecEN 16931

Strategy1. Find all lines/allowances/charges with this VAT category. 2. Ensure exactly one TaxSubtotal with matching category exists. 3. Create if missing.

Common Causes

·Split payment used on non-Italian invoice
·VAT category B (scissione pagamenti) on cross-border invoice
·Split payment applied without Italian buyer/seller
·Country codes not Italian but split payment selected
·Invoice misconfigured for Italian public sector rules

Seeing this in production? The API handles BR-B-01 automatically. See the fix response →

Related Errors

BR-16

Invoice line must have an identifier

BR-24

Amount currency must match document currency

BR-32

Each Document level allowance (BG-20) shall have a Document level allowance...

Last updated: 27 February 2026

Share this guide:

Handle BR-B-01 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-B-01:Split payment requires domestic Italian invoice