Our currency is Polish zloty (zl, PLN). In most places it is impossible to pay with euro or US dollars. Only some hotels and few shopping malls would accept euro. There are numerous ATMs in larger towns so you won’t have any problem with finding one and drawing Polish money. The other option is to use exchange offices. Majority of shops and restaurants accept credit cards. The most popular are VISA, MasterCard and Maestro. American Express and Diners may not be accepted. Do not bring traveller’s cheques as they are not accepted.