IT-R-008:CIG/CUP codes for public contracts
Fix: Add CIG (tender code) and CUP (project code) where required. Provide the required value in the free validator.
Italian B2G invoices require CIG and/or CUP codes.
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: CIG Code (Codice Identificativo Gara), CUP Code (Codice Unico Progetto)
What is IT-R-008?
IT-R-008 is a warning validation rule defined in the ubl-2.1 specification (ITA national rules). It validates the BuyerReference element under ProjectReference or in the UBL invoice XML.
The invoice may pass transmission, but this non-compliance can cause problems during tax audits or buyer-side processing.
Target path: XPath: //cac:ProjectReference or //cbc:BuyerReference
Why This Error Matters
Required for Italian public procurement traceability.
IT-R-008 is a soft failure that can cause issues at the receiving end — tax audits, ERP processing, or VAT reconciliation mismatches.
Validator Behavior
- ·Generates validation warning
- ·Fails UBL schema validation
- ·Rejected by SDI (Sistema di Interscambio)
- ·Error returned: IT-R-008
- ·Specification: ubl-2.1
How to Fix It
Get codes
CIG from tender, CUP from project
Add to invoice
ProjectReference or dedicated fields
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Incorrect value --> <cbc:BuyerReference>INVALID</cbc:BuyerReference>
<!-- Corrected value --> <cbc:BuyerReference>VALID_VALUE</cbc:BuyerReference>
Technical Reference
XPath: //cac:ProjectReference or //cbc:BuyerReferenceCommon Causes
- ·Missing CIG for PA invoice
- ·Missing CUP for funded project
Seeing this in production? The API handles IT-R-008 automatically. See the fix response →
Frequently Asked Questions
Italian B2G invoices require CIG and/or CUP codes.
Add CIG (tender code) and CUP (project code) where required. Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
IT-R-008 is a warning that may not always cause rejection, but should be addressed for full compliance.
Related Errors
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Last updated: 3 March 2026
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