Finnish citizenship can be acquired by birth, on the basis of the parents’ citizenship, by application or by declaration
Provisions on Finnish citizenship are laid down in the Constitution of Finland and in more detail in the Nationality Act. Finnish citizenship can be acquired by birth, on the basis of the parents’ citizenship, by application, or by declaration. Citizens may only be released from Finnish citizenship if they are citizens, or acquire the citizenship, of a foreign country.
Finnish citizenship is primarily determined in accordance with the inheritance principle, whereby children acquire the citizenship of their parents. This also applies to children born to Finnish citizens in foreign countries. Because the Finnish authorities are not automatically notified of children born abroad and of their Finnish citizenship, the parents should themselves notify the local register office or the Population Register Centre of the matter.
The Finnish Immigration Service decides on the granting, retention and loss of Finnish citizenship, in response to a declaration submitted to the Finnish Immigration Service.