IT-R-005:Invalid PEC email format
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 non-compliant and will be rejected by Peppol access points and national validation services. The sending system receives a rejection response and the invoice does not reach 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. Invoices that trigger this rule are rejected at the access point and never reach the recipient. In Peppol networks, this means your sending system receives an MLR (Message Level Response) with a rejection status. The invoice must be corrected and re-sent, adding delay to your payment cycle.
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). You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, IT-R-005 is a critical error that will cause invoice rejection. It must be fixed before submission.
Related Errors
Last updated: 27 February 2026
Handle IT-R-005 Automatically in Your Pipeline
The compliance engine auto-remediates this error with controlled safety policies and evidence pack generation.