Any person with a temporary visa must register with the Federal Police by scheduling an appointment within 90 days of his or her arrival in Brazil. After this registration, the student will receive a temporary foreign identity card.
To be admitted at Unicamp is mandatory that the student have either registered with the Federal Police or officially scheduled an appointment with them.
For further information on how to register, please check out here
Keep in mind that a student visa is mandatory for enrollment at Unicamp. Find more information here.