Q14 - What do I have to do if the web site doesn't run?
Q13 - What do I have to do if the VAT number of my customer appears as invalid?
If your information on VIES on-the-web is not up to date you should contact your tax administration.
Once the update will be made, it will be immediately visible through VIES on-the-web.
All taxable persons have the obligation to inform their tax administration that they perform VAT taxable transactions; in exchange, tax administration provides them with a unique VAT number.
VIES on-the-web allows to validate whether the VAT number provided by your customer is registered in the relevant national database.