Poland does not use the euro as its currency. However, under the terms of their Treaty of Accession with the European Union, all new Member States "shall participate in the Economic and Monetary Union from the date of accession as a Member State with a derogation", which means that Poland is obliged to eventually replace its currency, the złoty, with the euro.
There is no target date for Polish euro adoption, and no fixed date for when the country will join ERM-II (the fifth euro convergence criterion).[1]
Euro adoption will require the approval of at least two-thirds of the Sejm to make a constitutional amendment changing the official currency from the złoty to the euro.[2] The Law and Justice (PiS) party, Poland's largest political party, opposes euro adoption.[3][4] Prime Minister Donald Tusk has said that he may agree to a referendum on euro participation in order to gain their support for a constitutional amendment. There is not yet any official information on the design process for the Polish national sides of the euro coins.
prez
was invoked but never defined (see the help page).