Between 1 January 1925 and 31 December 1950
If you became a citizen of another country between 1 January 1925 and 31 December 1950, then you lost your Norwegian citizenship if you became a citizen of another country after you were born, and you resided abroad when you became a citizen of another country.
You have also lost your Norwegian citizenship if you moved from Norway after acquiring citizenship in another country.
You have not lost your Norwegian citizenship if you have only resided in Norway after you acquired another country’s citizenship or if you moved from Norway after 31 December 1950.
Documentation requirements
Documentation showing that you have not lost your Norwegian citizenship
You must submit documentation from the authorities of the other country whose nationality you acquired which shows that you automatically became a citizen of that other country when you were born.
If you do not have any such documentation, you may submit a printout of the legislation relating to citizenship in the other country where you are a citizen that shows the clauses under which you became a citizen of the other country. In addition, you must submit documentation showing that you became a citizen of the other country on the basis of those particular clauses.
If you acquired another citizenship at birth through one of your parents, the following documentation may be acceptable:
- a birth certificate and documentation showing that one of your parents was a citizen of the country when you were born.
If you acquired citizenship at birth because you were born in that country:
- a birth certificate, passport or other documentation showing that you were born in that country.
If you had not moved from Norway before 1 January 1951:
- school records, birth certificate, baptism certificate, written statement about where you have lived since you became a citizen of the other country.
Documentation showing that you have lost your Norwegian citizenship
If you became a citizen of another country after your parents applied for the other citizenship on your behalf, acceptable documentation may include:
- letter of decision/certificate/confirmation from the authorities of the country where you became a citizen showing when and how you became a citizen of that country, and
- school records, birth certificate, baptism certificate, written statement attesting to the fact that you lived abroad when you became a citizen of another country, or that you moved from Norway before 1 January 1951.
If you automatically acquired the nationality of another country after you were born because one of your parents became a citizen of that country, acceptable documentation may include:
- letter of decision/certificate/confirmation from the authorities of the country where you became a citizen showing that you became a citizen automatically at the same time that one of your parents became a citizen of that country, and
- school records, birth certificate, baptism certificate, written statement attesting to the fact that you lived abroad when you became a citizen of another country, or that you moved from Norway before 1 January 1951.
If you automatically acquired the nationality of another country because you married a national of that country, acceptable documentation may include:
- letter of decision/certificate/confirmation from the authorities of the country where you became a citizen showing that you became a citizen automatically because of marriage, and
- school records, birth certificate, baptism certificate, written statement attesting to the fact that you lived abroad when you became a citizen of another country, or that you moved from Norway before 1 January 1951.
Applicable law
"The Norwegian Nationality Act of 8 August 1924, no 3".