BR-BE-12:Mercurius endpoint format
Fix: Use the proper Mercurius identifier from the Belgian government portal. Provide the required value in the free validator.
B2G invoices to Belgian government must use the correct Mercurius endpoint format. The endpoint ID must be a valid Mercurius identifier.
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Mercurius Endpoint ID
What is BR-BE-12?
BR-BE-12 is a fatal validation rule defined in the Mercurius specification (BEL national rules).
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Why This Error Matters
BR-BE-12 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Error returned: BR-BE-12
- ·Specification: Mercurius
How to Fix It
Technical Reference
Code Example
<cbc:EndpointID schemeID="0208">0123.456.789</cbc:EndpointID>Common Causes
- ·Using wrong scheme ID for Belgian government
- ·Endpoint identifier not from Mercurius system
- ·Outdated government endpoint
Seeing this in production? The API handles BR-BE-12 automatically. See the fix response →
Frequently Asked Questions
B2G invoices to Belgian government must use the correct Mercurius endpoint format. The endpoint ID must be a valid Mercurius identifier.
Use the proper Mercurius identifier from the Belgian government portal. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, BR-BE-12 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-BE-12 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.
Related Content
Last updated: 3 March 2026
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