Frequently Asked Questions

General questions

Is AVAT.app free?

Yes, all tools are completely free and require no registration.

Do you store my queries or IP address?

No. See Privacy Policy — we do not store the IP address, user-agent, or any other identifier of the requester.

Where does the data come from?

From the public registries VIES (EU), ARES and MFCR (Czech Republic), and from the VAT rates registry. More in the About section.

VAT number verification

For questions about verifying individual VAT numbers, see Verify VAT Number.

Bulk validator

For questions about bulk validation, see Bulk VAT Validator.

Bank account / IBAN checker

For questions about account and IBAN verification, see Bank Account & IBAN Checker.

Unreliable VAT payer

For questions about the unreliable payer registry, see Unreliable VAT Payer Check.

VIES

For questions about the VIES system, see VIES VAT Number Validation.