This article considers the notions of “foreign citizen” and “dual citizenship”. The issues of “deportation” and “foreigner status” are also addressed, while different types of the latter are compared with legal status of a citizen.The development of legal status of foreigners after the acceptance of the Charter of the UN is also discussed. The legislation applied to the given category of persons is analyzed. The role of the Constitution of Russian Federation in regulating the issue is revised.The article touches upon the status of working migrants and members of their families. The authors briefly describe the situation of refugees, who can’t apply for this status, and the problem of monitoring of human rights of this type of population.