SDI-00200
Error Guide
🇮🇹 SDI-00200: Duplicate invoice number in Italy
ErrorMandatoryManual Fix
Invoice number + year combination must be unique per sender. SDI maintains a registry and rejects duplicates within the same fiscal year.
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 (SDI v1.9.1 effective May 15, 2026) rules for Italy.
How to Fix SDI-00200
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
- •Invoice number already used this year
- •Database restored with old numbering
- •Multiple systems using same number series
Fix SDI-00200 automatically
Upload your invoice and let Invoice Navigator auto-remediate this error.