Posts on Nationality in International Law may be found here.

Nationality  as an institution of international law enables states to attribute natural and legal persons to each other. In that respect it helps to regulate relations between states. A person possessing the nationality of a state may be said to belong to that state. The issue of a national passport to a person may be seen as a representation from that state to other states that the person belongs to it.

The terms ‘nationality’ and ‘citizenship’ are often used synonymously, although for some the former denotes a concept in international law whereas the latter denotes a relationship between a person and a state within that state.

International law is also a sources of rights in respect of nationality. There are international treaties that are a sources of nationality law rights and of human rights pertaining to nationality. There are also principles of customary international law that bear upon nationality.

Posts on Nationality in International Law may be found here.