The visitors should pay attention to changing their local currency to dollars before the journey, because money exchange could be a problem in the country. Use of bank cards is extremely popular in the United States. One can pay with it almost everywhere and there are also quite a lot of ATM machines too. The most popular types of cards are Visa, MasterCard and American Express cards. There are seven types of coins (2 and 1 dollar and 50, 25, 10, 5 and 1 cent coins) and six types of bank notes (100, 50, 20, 10, 5, 1 dollar notes) in circulation.