Author analyzes the problems of legal regulation of the citizenship of individuals in connection with the succession of states and the framework of the Conference on Security and Cooperation in Europe. European regional organizations are quite actively developing issues of citizenship in the succession of states, where significant progress has been made in this direction as well. It seems that the experience and results of the work on issues of nationality in connection with the succession of states can be claimed and applied as an example or a guide to action. And in legal sciences of the Republic of Uzbekistan it was the first attempt undertaken to explore the contemporary trends in theory and practices regarding the settlement of modern issues of the succession of states and its application in international law. The example of Uzbekistan was also analyzed.

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