BE-03
Error Guide
🇧🇪 BE-03: Belgian VAT numbers must be in correct format in Belgium
WarningMandatoryManual Fix
Belgian VAT numbers must be in correct format. This validation rule ensures Invoice compliance with CIUS-BE (Belgium).
Quick Facts
Severity
Warning
Ruleset
CIUS-BE (Belgium)
Mandate
B2B Mandatory
Fix Type
Manual
Why This Matters in Belgium
Belgium requires e-invoicing using Peppol BIS Billing 3.0 (UBL). This warning may cause processing delays in Belgium. While not immediately rejected, it should be fixed for compliance.
Invoice Navigator covers 89 Peppol BIS 3.0.17 rules for Belgium. Auto-remediates 91% of top rejection errors.
How to Fix BE-03
Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-BE (Belgium) (BE-03).
Example: Before & After
Before (invalid)
<Invoice> <!-- Issue: Belgian VAT numbers must be in correct format --> </Invoice>
After (fixed)
<Invoice> <!-- Issue resolved per CIUS-BE (Belgium) --> </Invoice>
Belgium E-Invoicing Requirements
Phase
Status
Scope
B2G
Live (Nov 2022)
All federal government suppliers
B2B
Live (Jan 2026)
All Belgian VAT-registered businesses
Fix BE-03 automatically
Upload your invoice and let Invoice Navigator auto-remediate this error.