There are no invoices in foreign duty-free shops, only shopping vouchers or promissory notes. Tiffany's stuff is more exquisite than the fake one. It has no warranty card.

Here are some ways to identify Tiffany:

First of all, a large part of counterfeit products can be distinguished from real products simply by texture. The real Tiffany details are carefully made, and the jewelry refracts beautifully in natural light, and the arc is smooth.

Secondly, all Tiffany products are marked, generally T&Co or Tiffany & Co, and silver ornaments are generally marked with 925. The logo of the bracelet is located on the back of the bracelet, the earrings are located on the back of the earrings, and some necklaces sometimes have the designer's signature. (For example, Bean series generally have Elsa Peretti's signature).