Abstract: The subject of the study is the conventional regulation of relations arising in connection with multiple and dual citizenship. The emphasis in the modern international regulation of issues of dual and/or multiple citizenship is generated by the progressive increase in actual states when a person has two or more nationalities, which affects the interests of several States. Such a phenomenon is accompanied by the emergence of a wide range of problems requiring interstate interaction, which, as a rule, is expressed in the conclusion of bilateral and multilateral treaties on bi- and polypatrism. Such treaties concluded within the framework of modern international law reflect either the negative attitude of the signatory States towards dual and multiple citizenship, or the desire of States to find relevant ways to eliminate the consequences of these phenomena, which are often caused by disputes between States. The article examines the practice of conventional resolution of problems caused by the presence of bi- and poly-patrid status, the changed vectors of the settlement of issues of dual and multiple citizenship, as well as priority areas of modern international law in this area. The article concludes that bilateral cooperation in the field of bipatrism is more effective, which nevertheless will not solve the problem of dual and multiple citizenship at the global level. In addition, the conclusion of a universal international agreement on bi- and polypatrism also does not seem to be an effective means of resolving disputes arising due to significant economic, political, ethno-cultural, historical and legal differences between States, in particular in matters of regulating citizenship. The author considers it necessary to develop new approaches to ensure greater effectiveness of the mechanism of international legal regulation of bi- and polypatrism.