What should European tourists do if they buy a fake watch in a watch shop near the Eiffel Tower in Paris?

as far as overseas shopping is concerned, try to choose larger stores to buy.

Large-scale and regular shopping stores will provide vouchers such as shopping invoices; However, many small shops do not provide these related bills, and it is difficult to defend rights without credentials. Even if there is a bill, you need to prove that the watch is fake, and you need to have an appraisal document issued by a professional appraisal agency to ask the store to make compensation and other related follow-up operations. Because it is transnational, it is likely to be a very long process.