Do the following

You can request information using an online form. 

You will need an online banking ID or a mobile certificate to access the Online Form service. 

Online form (in Finnish or Swedish)

If you want to request public information without strong identification, you can send an informal document request by mail. 

• In your message, describe as precisely as possible what information you want and on what basis. This will speed up the processing of your request.
• Our postal address is: Digital and Population Data Services Agency, PO Box 1004, FI-00531 Helsinki