errorITAFatturaPA

SDI-00200:Duplicate invoice number

Invoice number + year combination must be unique per sender. SDI maintains a registry and rejects duplicates within the same fiscal year.

Fix this in your source system

MANUAL

SDI maintains a registry of all submitted invoices. If this number+year combination was already accepted, you must generate a new unique invoice number in your ERP/accounting system. If the original was rejected for other reasons, fix those issues - the number itself is still available.

See the step-by-step instructions below to fix this error manually.

How to Fix It

Code Example

<Numero>2025-00123</Numero>

Common Causes

  • Invoice number already used this year
  • Database restored with old numbering
  • Multiple systems using same number series

Frequently Asked Questions

Invoice number + year combination must be unique per sender. SDI maintains a registry and rejects duplicates within the same fiscal year.
Ensure unique sequential numbering and include year in the invoice number. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, SDI-00200 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted by the recipient's system.
Many instances of SDI-00200 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including duplicate invoice number.

Last updated: 19 January 2026

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