Yes. If at checkout you are paying in a currency other than USD, there will be a rate conversion involved with an added exchange fee of 2.5%. Make sure that the balance in your card covers the amount converted to USD plus 2.5% for currency exchange. Otherwise, your transaction will be declined and your card will be charged a $0.50 declined transaction fee. For example, if you are checking out for 1,500 UAE Dirham and the MasterCard conversion rate is 3.675 your card should have a balance of $419 for the transaction to be authorized.