The thesis aims at making a survey and an analysis of different prerequisites to bring an action against particular legal persons i.e. the state, persons performing media activities and those exempt from jurisdiction. The methods applied therein are primarily casuistic and comparative encompassing comparison of the Croatian legal system with selection of legal systems i.e. the German and the legal system of the United States. Taking the experience of these legal systems into consideration the possibility of their general implementation into the Croatian legal system shall be researched into. Herewith the specifics of general procedural prerequisites such as active and passive legitimacy, time-limits and jurisdiction shall be analysed and the emphasis shall be put on specific procedural prerequisite such as filing legal claims referring to media activities and obligation of preliminary procedure with the purpose of peaceful settlement of disputes in which the state is one of the parties to the dispute. The solutions to the issues of admissibility of claims against the state, against persons exempt from jurisdiction as well as the issue of media law conflict of interests between the right to personality on the one hand and freedom of expression of media on the other hand are in focus of interest of both national and international scientists. A number of international publications speak for the fact that these topics have become a current issue. There have been a number of recent publications in domestic literature raising the question of admissibility of claims against the Republic of Croatia and in this context the obligatory implementation of the reconciliation procedure and also sources on procedures involving persons that are granted immunity and forms of settlement of disputes related to the media law conflict of interests. In reference to actions against the state before its court the doctoral thesis focuses on the question if the initially set legal protective objective of reducing the number of trials is achieved by introducing mandatory preliminary procedure of peaceful dispute settlement in which the Republic of Croatia could be one of the parties to the dispute and if there is a similar practice in comparative legal system. Furtheron, the action against persons performing media activities, as a rule media publishers, stands out for its specifics of the procedural organisation. A certain level of giving preference to the persons performing media activities as parties in the procedure results from the need to respect their right to expression and need to avoid the self-censorship for the fear of action. Therefore, the thesis shall research into deviation of special procedural rules from general ones applied regarding these persons and into the question if such deviation is justifiable. Regarding the persons exempt from jurisdiction the thesis shall focus on the foreign states immunity, diplomatic and consular immunity as well as the immunity of international public organisations; research shall be conducted into possibilities to bring an action against these persons and persons related to them as well as into the requirements that have to be met; the question who shall be authorized to decide on application and scope of their immunity shall also be researched into. Since procedural law aspects of prerequisites to bring an action against the state, persons exempt from jurisdiction and media have not been systematically and integrally elaborated yet, this topic is suitable for a deeper research by the means of the doctoral thesis. Thus the aim of the research is to analyze the prerequisites to bring an action against aforesaid legal persons, to research into the current state of affairs in the Republic of Croatia and compare it with the selected legal systems as well as to research into the possibilities of further receptions in this regard.