Between 1 January 1951 and 10 March 1999

If you became a citizen of another country between 1 January 1951 and 10 March 1999, then you lost your Norwegian citizenship if you or your parents applied, or gave consent, for you to become a citizen in the other country after you were born.

You have also lost your Norwegian citizenship if you automatically became a citizen of another country because:

  • one of your parents acquired citizenship in the country after applying for it, and
  • the same parent had parental responsibility for you, and
  • the other parent was not a Norwegian national or did not have parental responsibility for you.

You have not lost your Norwegian citizenship if you automatically became a citizen of another country:

  • when you were born (acquisition of dual citizenship at birth), or
  • because you married a citizen of another country, or
  • because one of your parents became a citizen of another country and the same parent had no parental responsibility, or
  • because one of your parents who had a part in the overall parental responsibility for you became a citizen of another country and your other parent, who also had parental responsibility for you, was still a Norwegian national.

Documentation requirements

Documentation showing that you have not lost your Norwegian citizenship

Dokumentasjon på at du ikke har tapt ditt norske statsborgerskap 

You must submit documentation from the authorities in the other country whose nationality you acquired which states when you became a citizen of that other country, and that citizenship was granted automatically:

  • when you were born (acquisition of dual citizenship at birth), or
  • because you married a national of another country, or
  • because one of your parents became a citizen of another country and the same parent did not share any parental responsibility, or
  • because one of your parents who had a part in the overall parental responsibility for you became a citizen of another country and your other parent, who also had parental responsibility for you, was still a Norwegian national.

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 acquired citizenship automatically after you were born:

  • documentation showing that the parent with the same citizenship you acquired did not have parental responsibility for you, or
  • documentation showing that your other parent was still a Norwegian national and had parental responsibility for you when you became a citizen of the other country.
  • hadde foreldreansvar for deg da du ble borger av det andre landet  

If you acquired citizenship through marriage with a foreign national:

  • a marriage certificate and documentation showing that you became a national of that country because you entered into marriage without any possibility of opposing becoming 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:

  • 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.

If you automatically acquired citizenship in another country because one of your parents became a citizen of that country, then you must submit some type of documentation from the authorities of that country that can confirm that:

  • you automatically became a citizen at the same time that one of your parents became a citizen of that country, and
  • the parent whose other nationality you acquired had parental responsibility for you, and
  • no parent with parental responsibility for you continued to be a Norwegian national.

Applicable law

"The Norwegian Nationality Act of 8 December 1950".