This thesis addresses the topic of probate proceedings, specifically the determination of jurisdiction in probate cases. To facilitate a better understanding of the subject, the thesis begins with a concise overview of the basics of inheritance law in the Republic of Croatia, including the definition of inheritance law, its principles, the foundations of inheritance, and the prerequisites. The second part of the thesis deals with jurisdiction according to the rules of the Civil Procedure Act, with an emphasis on types of jurisdiction and conflicts of jurisdiction. This section also covers the rules for determining jurisdiction within the probate process itself. Furthermore, the central part of the thesis explores the probate process, presenting a chronological order of the actions undertaken in the probate procedure, from its initiation to the finality of the decision as the conclusion of the process. Following this, the concept of notaries public and their role as court commissioners in the probate process is examined. The final part of the thesis analyzes Regulation (EU) No 650/2012 of the European Parliament and of the Council of 4 July 2012 on jurisdiction, applicable law, recognition and enforcement of decisions and acceptance and enforcement of authentic instruments in matters of succession and on the creation of a European Certificate of Succession, specifically focusing on how jurisdiction is determined for probate cases with cross-border elements, along with examples of issues that arise in practice.