ilmoittautua

Verb

 * 1) to enrol/enroll in, register in e.g. a school or course
 * 2) to sign up for, join to add one's name to the list of people who are participating in something, join an amateur team
 * 3) to enter e.g. a competition, contest
 * 4)  to report to show up or appear at an appointed time; to present oneself
 * 5)  to register, check in, sign in, report (to the reception / receptionist, admissions office, or medical staff), say / give your name to the receptionist, fill in / complete your registration (form)
 * 1) to enter e.g. a competition, contest
 * 2)  to report to show up or appear at an appointed time; to present oneself
 * 3)  to register, check in, sign in, report (to the reception / receptionist, admissions office, or medical staff), say / give your name to the receptionist, fill in / complete your registration (form)
 * 1)  to register, check in, sign in, report (to the reception / receptionist, admissions office, or medical staff), say / give your name to the receptionist, fill in / complete your registration (form)

Usage notes
What you register or enroll in, sign up for, or enter is in the illative or allative case, depending on the situation. The choice is idiomatic and clear to Finns, but linguists have not yet been able to formulate or discover a rule.