Declaration of Citizenship by Nordic Citizens

Requirements:

• You are a citizen of a Nordic country and are at least 18 years of age.

• You have become a citizen of a Nordic country not by application but by some other way.

• You have lived in Finland for the past five years.

• You have not been sentenced to imprisonment during the past five years.

Required documents:

• Valid passport or other official ID

• Proof of continuous residence in Finland (typically registered address history from the Finnish Population Information System)

• Birth certificate and possibly a certificate proving current citizenship.

Source: https://migri.fi/en/nordic-citizen