Become a Katko member by filling out this form and paying the membership fee to Katko's account FI55 5710 0420 8080 65. In the message field write "[your full name] membership fee". The international student membership is valid for one (1) year and it costs €10. But if you want you also pay seven (7) years membership and it costs €35. 

As per Finnish law, registered organizations are required to keep a list of their members. This information is ONLY used for membership purposes and disposed of once the membership has expired.