Italian VAT Number Validator

How it works

1. Enter the Partita IVA (11 digits). 2. Click Verify. 3. Read the result.

When to use it

VAT number verification is necessary for:

• Invoice issuance: before issuing an invoice to a new client, verify their VAT number is formally valid.
• Due diligence: in business operations, formal VAT number verification is the first check to perform.
• New suppliers: verify a new supplier's VAT number before placing an order or payment.
• Online forms: in B2B registration forms, validate the VAT number entered by users to reduce errors.
• Developers: use the checksum as reference for implementing validation in your applications.

Advantages

Instant formal verification. Compliant checksum check.

Benefits vs alternatives

Advantages of our validator:

• Real checksum verification: doesn't just check format (11 digits), but calculates the algorithmic checksum.
• Instant result: validation happens in real time, no waiting.
• No data saved: the VAT number entered is not recorded or transmitted.
• Free: no verification limits, unlike premium services.
• Educational: explains how the Italian VAT number checksum algorithm works.

Common mistakes to avoid

1. Confusing formal and substantive verification: this tool only verifies that the format and checksum are correct. It does not verify if the VAT number is actually active or who it belongs to.
2. Entering spaces or dots: the VAT number must be entered as 11 consecutive digits, without spaces, dots or "IT" prefix.
3. EU VAT numbers: the Italian format is different from other EU countries. This tool only verifies Italian VAT numbers.
4. Ceased VAT numbers: a formally valid VAT number might be ceased. For official verification use the EU VIES service or the Revenue Agency website.

Category