The official currency is the Cedi (GHC), which is divided into 100 pesewas. Foreign currency can be exchanged at any forex bureau as well as at some commercial banks; banks and foreign exchange facilities are available at the airport and in all major towns. It is advisable to keep currency exchange receipts in order to be able to re-exchange when departing. Banking hours are usually from 8.30am to 3pm Monday to Friday, and most large commercial banks have ATMs located outside, although only limited amounts of Cedis can be drawn at a time. The most widely accepted credit cards are American Express, Diners and Visa, and cards can be used for payment at major hotels and shops, although this can be risky as credit card fraud is very common. The best currencies to bring are US dollars, British Pounds or Euros as other currencies exchange at poor rates. Travellers should be aware that larger Cedi notes can usually only be used in larger establishments such as hotels and restaurants as smaller enterprises will often not have change.