According to about.com, foreign currency can be exchanged for U.S. Dollars at banks, international airports, seaports, and some large hotels. Identification, such as a passport, may be required.
According to about.com, some banks will only exchange currency for current account holders. Cash, in U.S. Dollars, may be withdrawn from foreign and domestic accounts through an automatic teller machine or ATM. Transaction costs are typically higher at air and sea ports. About.com recommends exchanging currency at a bank or withdrawing directly through an ATM because these methods have the lowest fees. Financial institutions should be notified prior to foreign ATM use to prevent blocked transactions.