VIESAC

Check VAT and GST identifiers across supported countries, validate EU and UK EORI numbers, and keep the evidence in your compliance workflow. VIESAC connects ChatGPT to EU VIES and supported national registries for VAT/GST validation, customs identifier checks, VAT rates and your organization's audit history.

Use quick checks to see the registry result without creating an audit. When you need documented evidence, request a VAT, EORI or combined audit and retrieve its reference, available company details and certificate links. Search your own past audits by identifier or company name, filter audit history and check your remaining audit credits. VAT-rate tools return supported standard, reduced and regional rates with their source information. Registry coverage and availability vary by country; see viesac.eu/countries.

Connect your VIESAC account through the secure sign-in flow, choose an organization and review its permissions. Read access covers checks, rates, usage and audit history; creating audits requires the audit permission. You can revoke the connection from your VIESAC API keys page. Never paste a password or API key into a conversation.

Creating an audit consumes existing account credits; optional monitoring creates further audits on its schedule. Certificate availability, permissions and account limits apply. Check the connected account's remaining credits before requesting a series of audits.

VIESAC is an independent service operated by Comet Group OÜ. It is not a tax authority or a provider of legal or tax advice. An unavailable registry result is not proof that a number is invalid.