All the banks will send the terms and conditions along with their Credit Card when they issue the CC. The fine print states that for all the transactions other than the local currency, the rate applied will be prevailing exchange rate and an additional charge of 1% to 5% (Depends from bank to bank and type of card )will be charged to the transaction.

If you are a credit card holder, didn't read the fine print it will be fine until you are fined on the printed statement.

"Caveat emptor"