DOUBLE NATIONALITY condition that some people have to have two (or more) passports for being recognized as connationals of two (or more) countries simultaneously. The vast majority of cases are given by two possibilities : 1 . that the person is the child of parents from countries with IUS SANGUINI legislation but who was born in a country with IUS SOLI legislation, or vice versa and 2 . Immigrants who are nationalized but that local law allows them to also maintain their nationality of origin.
To have recognition as a citizen of two countries, the native and a second State, either for reasons of family kinship or at the request of the interested party, subject to regulatory compliance of the second Country.