IT-R-005:Invalid PEC email format
Fix: Use valid PEC email domain (.pec.it or certified provider). Provide the required value in the free validator.
Italian PEC email must be valid certified email address.
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: PEC Email Address
What is IT-R-005?
IT-R-005 is a fatal validation rule defined in the ubl-2.1 specification (ITA national rules). It validates the ElectronicMail element under EndpointID or 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: //cbc:EndpointID or //cbc:ElectronicMail
Why This Error Matters
PEC is used for legal delivery when Codice Destinatario is 0000000.
IT-R-005 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Fails UBL schema validation
- ·Rejected by SDI (Sistema di Interscambio)
- ·Error returned: IT-R-005
- ·Specification: ubl-2.1
How to Fix It
Check PEC domain
Must be certified email provider
Verify format
Valid email format required
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Missing or empty element triggers cbc:ElectronicMail error --> <cbc:ElectronicMail></cbc:ElectronicMail>
<!-- Provide the required value --> <cbc:ElectronicMail>VALID_VALUE</cbc:ElectronicMail>
Technical Reference
XPath: //cbc:EndpointID or //cbc:ElectronicMailCommon Causes
- ·Invalid PEC domain
- ·Regular email instead of PEC
Seeing this in production? The API handles IT-R-005 automatically. See the fix response →
Frequently Asked Questions
Italian PEC email must be valid certified email address.
Use valid PEC email domain (.pec.it or certified provider). Invoice Navigator detects this error and prompts for the required business data before applying a safe fix.
Yes, IT-R-005 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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