BE-03:Belgian VAT numbers must be in correct format
Belgian VAT numbers must be in correct format. This validation rule ensures Invoice compliance with CIUS-BE (Belgium).
Engine Classification
Financial or legal field · Modification blocked by policy
What is BE-03?
BE-03 is a warning validation rule defined in the CIUS-BE (Belgium) specification (BEL national rules). It checks whether belgian vat numbers must be in correct format.
This is a soft validation failure. The invoice may pass initial transmission, but non-compliant values in this field can cause problems during tax audits, buyer-side processing, or downstream VAT reconciliation.
Why This Error Matters
Belgian e-invoicing regulations require this for legal compliance. Invoices missing this information may be rejected by Belgian government portals and business partners.
BE-03 is a soft failure. The invoice may pass initial validation, but the non-compliant field can cause issues at the receiving end — tax authorities may flag it during audits, buyer ERP systems may fail to process it, or VAT reconciliation may produce mismatches. Fixing warnings before they accumulate prevents larger compliance gaps.
Validator Behavior
- ·Generates validation warning
- ·Error returned: BE-03
- ·Specification: CIUS-BE (Belgium)
Before / After
<Invoice> <!-- Issue: Belgian VAT numbers must be in correct format --> </Invoice>
<Invoice> <!-- Issue resolved per CIUS-BE (Belgium) --> </Invoice>
Technical Reference
Seeing this in production? The API handles BE-03 automatically. See the fix response →
Related Errors
Last updated: 27 February 2026
Handle BE-03 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.