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VAT Number Checker UK — Free GB VAT Validation | Aitaxo UK

Free UK VAT number checker. Validate any GB VAT number format and check the modulus-97 algorithm instantly.

GB VAT number verification

Verify the format and validity of UK VAT numbers instantly. Uses the official HMRC Modulus 97 verification checksum.

  • ✓ GB format validations
  • ✓ HMRC Modulus-97 verification
  • ✓ Instant validation responses