Can you use any currency in duty free?

In duty-free shops, purchases are typically made in the local currency of the country where the shop is located, as well as in widely accepted currencies like US dollars or euros. However, the specific currencies accepted can vary by location. It's advisable to check with the duty-free store prior to making a purchase to confirm which currencies they accept. Additionally, credit cards are generally accepted, providing another way to make purchases in duty-free.