- To check if a GB VAT number is valid you can use this service: https://www.tax.service.gov.uk/check-vat-number/enter-vat-details
- To check if a GB EORI number is valid you can use this service: https://www.gov.uk/check-eori-number
- To check if an EU VAT number is valid you can use this service: https://ec.europa.eu/taxation_customs/vies/vieshome.do?selectedLanguage=EN
- To check if an EU EORI number is valid you can use this service: https://ec.europa.eu/taxation_customs/dds2/eos/eori_validation.jsp?Lang=en
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