FR-R-004:Chorus Pro engagement number required
Fix: Add OrderReference with engagement juridique number. Provide the required value in the free validator.
French B2G invoices require engagement juridique (purchase order reference).
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: Numéro d'Engagement Juridique
What is FR-R-004?
FR-R-004 is a fatal validation rule defined in the factur-x specification (FRA national rules). It validates the ID element under Invoice > OrderReference in the UBL invoice XML.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Target path: XPath: /Invoice/cac:OrderReference/cbc:ID
Why This Error Matters
Required for Chorus Pro routing and payment authorization.
FR-R-004 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Rejected by Chorus Pro
- ·Error returned: FR-R-004
- ·Specification: factur-x
How to Fix It
Get engagement number
From the public entity purchase order
Add OrderReference
Include cbc:ID with the EJ number
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Missing or empty element triggers cbc:ID error --> <cbc:ID></cbc:ID>
<!-- Provide the required value --> <cbc:ID>VALID_VALUE</cbc:ID>
Technical Reference
XPath: /Invoice/cac:OrderReference/cbc:IDCommon Causes
- ·Missing EJ number
- ·Wrong reference field used
Seeing this in production? The API handles FR-R-004 automatically. See the fix response →
Frequently Asked Questions
French B2G invoices require engagement juridique (purchase order reference).
Add OrderReference with engagement juridique number. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, FR-R-004 is a critical error that will cause invoice rejection. It must be fixed before submission.
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Last updated: 3 March 2026
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