As a citizen of a non-EU/EEA country, you need to apply for residence permit before arriving in Finland if you study in Finland for longer than three months. If you have a residence permit for studies in another EU country, you may not need a residence permit to Finland but instead you must submit a mobility notification.
Check whether your residence permit card has a Finnish personal identity code. It is a number sequence with 11 characters, formed on the basis of your date of birth. If you have this code, you do not need to do any other registration process with the authorities after your arrival in Finland. You just need to submit a notification of move about a temporary move to Finland. You can do that by visiting your local post office.
If your residence permit card does not include a personal identity code, you can apply for the code at the check-in event of the orientation week, from the representatives of the Digital and Population Data Services Agency. Before the event, complete the registration notice of a foreigner as an electronic form as soon as you have an address in Finland and you have IT user account of the University of Helsinki and you can form a certificate of student status from Sisu. Link to the registration form and instructions of DVV.
In case you cannot participate in the orientation week, you can get the identity code by booking an appointment time on Digital and Population Data Services Agency's website
Your identity code will be sent to you as a secure email. Please remember to check your spam folder and open the email soon after receiving it, as it usually expires after few weeks and cannot be reopened. Note down your identity code so you remember it.
If you have not received your personal identity code within 2 months, you can send an email to DVV to ask about the process at international@dvv.fi
Once you have received your Finnish personal identity code please update it in the student register. You can do it by visiting the Student Services. Bring with you proof of your new identity code and your official ID.
You can also send the last four digits of your personal identity code by email to studentinfo@helsinki.fi, along with your student number.