Abstract
The purpose of this article is to examine the international legal aspects of citizenship on the basis of the laws of Kazakhstan and the UK analysis. The author used general theoretical and specific scientific investigation methods. Based on the analysis of Kazakhstan legislation, it was concluded that the methods of obtaining Kazakhstan's citizenship are: 1) by birth; 2) as a result of naturalisation; 3) on the basis of interstate contracts of Kazakhstan; 4) on the grounds provided by the Law of Kazakhstan 'on citizenship'. There are also ways to obtain UK citizenship under the British Nationality Act of 1981: 1) by birth; 2) by origin; 3) by naturalisation; 4) by registration. Also author concluded that bipatrism adversely affects the state and carries a large risk to the state, including the loss of independence and sovereignty.