Born after 1 September 2006
If you were born on or after 1 September 2006, you became Norwegian at birth provided that your mother or father was Norwegian when you were born.
Documentation
You must have a birth certificate and you must be able to document that at least one of your parents was Norwegian when you were born.
If your father was the one who was Norwegian, you must document paternity. If your parents were married when you were born, you must provide a marriage certificate. If your parents were not married, or if they married after your birth, you must provide documentation showing that paternity has been established by the correct Norwegian authority. See "Who is deemed to be the father in citizenship cases?" for more information.
Applicable law
"The Norwegian Nationality Act of 10 June 2005".