If you reached the age of 22 between 1 January 1925 and 31 December 1950 then you automatically lost your Norwegian citizenship on your 22nd birthday if you:
If your father or your husband lost their Norwegian citizenship when reaching the age of 22, then you lost your citizenship as well.
If your mother lost her Norwegian citizenship when reaching the age of 22, and she was not married to your father, then you lost your citizenship as well.
You do not lose your citizenship, however, if you have applied to retain your Norwegian citizenship and you have received a letter of decision from the Ministry of Justice and Public Security affirming that you were allowed to retain your Norwegian citizenship after reaching 22 years of age (retention of citizenship).
If you acquired Norwegian citizenship after you were born because you or your parents either applied for, or submitted notification of, citizenship on your behalf, acceptable documentation may include:
If you automatically acquired Norwegian citizenship when your parents entered into marriage, then you must provide:
If you were born in Norway:
If you were born abroad, you must document that you have resided in Norway before reaching the age of 22. Acceptable documentation may include:
If you have received a letter of decision affirming that you are allowed to retain your Norwegian citizenship (retention of citizenship):
"The Norwegian Nationality Act of 8 August 1924, no 3".