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European Commission VIES · GB VAT

VIES VAT number check

Validate a VAT identification number through the European Commission VIES REST service, including GB numbers where still accepted by the checker. Valid numbers prove Affix yes with Merkle proof.

VIESEC service
GB / EUVAT IDs
MerkleAudit leaf

Live check

Run vies vat check

Source: European Commission VIES. Every search attaches a fresh Affix Merkle proof.

Two-letter VAT member state code.

Digits without the country prefix, or include the prefix in one field.

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Questions

Why might a real GB number return no?

VIES can reject formats, unavailable member-state connections, or numbers not registered for intra-EU trade checks.

Do you store VAT numbers?

This testing page forwards your query to VIES and Affix for the proof. Do not submit secrets beyond the public VAT ID.

Is HMRC the source?

The live check runs through the Commission VIES service rather than an HMRC private API key.