Between 1 September 2006 and 31 December 2019

If you became a citizen of another country between 1 September 2006 and 31 December 2019, then you lost your Norwegian citizenship if you or your parents applied, or gave consent, for you to become a citizen in that 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 that country after applying for it, and
the same parent had parental responsibility for you, and
the other parent was not a Norwegian national.

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 national 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 shared parental responsibility became a citizen of another country and your other parent was still a Norwegian national.

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 states when you became a citizen of the other country, and that citizenship was granted automatically on the basis of the criteria listed above.

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 that your other parent was still a Norwegian national.

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 you applied, or after your parents applied on your behalf, for the other citizenship, the following documentation may be acceptable:

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, you must also document that the parent through whom you acquired citizenship had parental responsibility for you and that the other parent was not Norwegian.

Acceptable documentation may include:

confirmation from the authorities of the country where you became a citizen showing that you automatically became a citizen at the same time that one of your parents became a citizen of that country, and
documentation showing which of your parents had parental responsibility for you, and
documentation showing that neither of your parents continued to be a Norwegian citizen.

Applicable law

"The Norwegian Nationality Act of 10 June 2005".