Duty-free goods are products that can be purchased without the usual taxes and tariffs that apply to regular sales. These items are typically sold at airports, seaports, and border crossings, allowing travelers to buy them while traveling internationally. The savings come from the fact that these goods are exempt from local import duties. To qualify for duty-free shopping, customers usually need to show proof of international travel, such as a passport and a boarding pass. There are limits on the quantity and value of duty-free goods that can be brought back into a country, which varies by location and regulations.