You can have several citizenships recorded in the Population Information System. The Digital and Population Data Services Agency will record your citizenship in the Population Information System based on a valid passport, the original decision on naturalisation or some other reliable evidence.
If you are a Finnish citizen, you have the obligation to notify the Finnish Population Information System of the foreign citizenship you have received.
Losing Finnish citizenship
If you are a citizen of both Finland and another state, you may automatically lose your Finnish citizenship when you turn 22. If you have a sufficient connection with Finland, you will not lose your Finnish citizenship. You have a sufficient connection with Finland, for example, if you have between the ages of 18 and 22 informed the Digital and Population Data Services Agency or a Finnish diplomatic mission of your wish to retain your Finnish citizenship or you have applied for a Finnish passport or identity card, which has been granted to you. If you suspect that you may have lost your Finnish citizenship, contact a Finnish diplomatic mission or the Digital and Population Data Services Agency.
Do the following
- Deliver the original decision or certificate of your citizenship to the Digital and Population Data Services Agency or present a valid passport.
- If you are a Finnish citizen, you can also deliver an account of the situation to the nearest Finnish diplomatic mission.
- See also the separate instructions concerning the possible requirements to legalise the decision or certificate.
- If you are applying for Finnish citizenship, contact the Finnish Immigration Service.