The Taxation site of the European Union has a technical issue at the moment which is preventing the verification of EU Tax numbers. If you try to make a purchase using a VAT number you will see the following error "the eu vat can't be checked at the moment" and won't be able to complete transaction.
If you follow this post we will update it when the site is available again so you can process your purchase as soon as service is restored.
The EU Tax verification service has now been restored and you can now enter your EU Tax details onto a purchase to be checked. Thanks for your patience while this issue was resolved