SDI-00400
Error Guide
🇮🇹 SDI-00400: XML schema validation failure in Italy
ErrorMandatoryManual Fix
FatturaPA XML must conform exactly to the official XSD schema published by Agenzia delle Entrate. Any structural deviation causes rejection.
Quick Facts
Severity
Error (rejection)
Ruleset
FatturaPA
Mandate
B2B Mandatory
Fix Type
Manual
Why This Matters in Italy
Italy requires e-invoicing using FatturaPA (XML). Invoices with this error will be rejected. They cannot be processed for Italy compliance.
Invoice Navigator covers 98 FatturaPA 1.2.2 rules for Italy. Auto-remediates 82% of top rejection errors.
How to Fix SDI-00400
Italy E-Invoicing Requirements
Phase
Status
Scope
B2G
Live (Jun 2014)
All public administration suppliers
B2B
Live (Jan 2019)
All domestic transactions
B2C
Live (Jan 2019)
All domestic transactions
Flat-rate taxpayers
Live (Jul 2022)
Extended to forfettari regime
Common Causes
- •Custom fields causing schema violation
- •Invalid XML characters
- •Wrong element order or nesting
Fix SDI-00400 automatically
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