Customs reserve the right to stopany package that arrives from non-EU countries (including Switzerland); if the package has been stopped you should receive at home a registered letter from the Postal Customs requiring the filling-in of a document proving the contents and value of the item purchased.
In order to proceed with customs clearance you will need:
invoice certifying the purchase
tax code or VAT number of the purchaser
buyer's identity document
Declaration on the contents of the package
Once these first procedures have been completed, the go-ahead should normally be given to the price of customs stamps, VAT and duties of various kinds, depending on the contents of the consignment itself.