The personal Code is the code of 8 digits used to access online services, and that will be your id for all of your relations with the University. For the exams you will be, however, in addition to the identification document, the serial number: a 6-digit number that must be written on the examination paper and allows you to publish the results of their examinations in an anonymous form. You can find it in the on-line services, in the top right of the login.