According to the European Commission, it is possible to get VAT numbers from each European Union country's tax database. The EU's VAT Information Exchange System, or VIES, also aggregates VAT data from the individual countries' databases and can confirm the validity of an individual VAT number.
The VIES website confirms or denies whether a given VAT number is valid, notes the European Commission. It also confirms or denies whether that number is associated with a specific company name and address. The various national databases do not all have websites to supply VAT information; some must be contacted by fax, mail or telephone, often in the home country's language. The VAT, or value added tax, ID number is used for company tax identification in many countries, particularly in Europe.