The unit of currency used in Greece is the Euros.
ATMs are available in many parts of the Greek Islands ensure you inform your bank before traveling abroad, and be aware you may be charged for cash withdrawals. It is advisable to exchange some cash before arriving in Greece. VAT is currently at 24%. There are reduced rates of 13% (food, medicines) and 6.5% (hotel accommodation, books and newspapers).
Normal banking hours are typically Monday to Friday from 8am to 2.30pm. Use this as a general guide as there maybe some variation from bank to bank.
Visa and MasterCard are most wildly accepted in shops, restaurants and hotels. A minimum spend amount may be required. American Express is generally not accepted other than in major hotels and international rental car agencies. If you lose your credit card when traveling, you should immediately contact your credit card company’s emergency hotline to cancel the card. These numbers may be helpful :
Visa: Toll free 1-800-VISA-911
MasterCard: Toll free : 0 800 90 1387
Diner's Club: Toll free : 0810 314 159
American Express: Toll free : 1 877 FTC HELP (1 877 382 4357)