The Republic of Croatia is an independent and independent country that, by joining the European Union, has promised to introduce the euro as its national currency when all the conditions are met. The European Union is a community that expands its borders by the membership of states that through membership applications, negotiations, and meeting the set conditions of the wider borders of the European Union.. The European Union is an institution that protects its members, helps through various funds and thus reduces the differences in economic, economic and other forms between countries, trying to make the differences as little as possible. In order for the Republic of Croatia to adopt the euro, it had to meet the conditions met by other Member States, and to approach its goal, the Law on the Introduction of the Euro as the Official Currency of the Republic of Croatia was passed. The aforementioned Act describes in what way and since the dual circulation, the period of dual price display, supervision for committed offenses, bodies authorized to supervise the application of the Act as well as fines. The period in which the currency exchange was carried out was short and passed without major problems. The public has been informed before through the media about the details of the introduction of the euro as the official currency as well as where additional information related to the euro is available. With the introduction of the euro, there have been changes both positive and negative. Everything that other member states have gone through has passed and is still passing the Republic of Croatia. It is also too early to show more positive changes with the introduction of the euro and it takes time and patience to progress.