In Bosnia and Herzegovina, the local currency is the convertible Mark (KM), which is tied to the euro at a rate of 1KM to €0.51129 (at the time of press).  Convertible Mark coins come in denominations of 5, 10, 20, 50 pfenings and 1, 2, 5 marks while banknotes come in 1, 5, 10, 20, 50, 100, 200 and 500 marks.  Many establishments (especially hotels) accept euros (notes only).  ATMs are all over the place with MasterCard, Visa and their offshoots being accepted.  Credit cards such as Visa, Mastercard and Diners Club are readily accepted by larger establishments all over the country.  When changing money, it is best to ask for small bills as shops often are hard-pressed for change.  Traveller cheques can be readily changed at Raiffeisen and Zagrebacka Banks.