Article 20
Where a supply of services carried out for a taxable person, or a non-taxable legal person deemed to be a taxable person, falls within the scope of Article 44 of Directive 2006/112/EC, and where that taxable person is established in a single country, or, in the absence of a place of establishment of a business or a fixed establishment, has his permanent address and usually resides in a single country, that supply of services shall be taxable in that country. The supplier shall establish that place based on information from the customer, and verify that information by normal commercial security measures such as those relating to identity or payment checks. The information may include the VAT identification number attributed by the Member State where the customer is established.