Between 11 March 1999 and 31 August 2006

If you became a citizen of another country between 11 March 1999 and 31 August 2006, 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 lost your citizenship if your parents applied for you to become a citizen of another country before you reached the age of 18, and no parent with parental responsibility for you remained Norwegian after you became a citizen of the other country.

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.

Also, you have not lost citizenship if your parents applied for you to become a citizen of another country before you reached the age of 18, and at least one of your parents, who had parental responsibility for you, remained Norwegian.

Documentation requirements

Documentation showing that you have not lost your Norwegian citizenship

You must submit documentation from the authorities in the other country whose nationality you acquired confirming 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 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.

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 that 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.

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.

If you acquired another citizenship because your parents applied for citizenship for you before you reached the age of 18:

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
documentation showing that at least one of your parents, who had parental responsibility for you, remained Norwegian.

Documentation showing that you have lost your Norwegian citizenship

If you became a citizen of another country after applying for citizenship:

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 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, and
documentation showing that no parent with parental responsibility for you remained Norwegian after you became a citizen of the other 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 as one of your parents became a national 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" (with amendments to the wording in Section 1).