What do I do, if I leave Berlin before I receive all of my grades/certificates?
The grading process can take up to several weeks after the lecture period has ended. You may well have returned to your home countries by the time your grades are available (either in Campus Management oder as "Scheine"). This should, however, not be a problem. Just make sure you keep the contact details of your professors safe and that you provide them with an alternative email address in case your FU email address expires. Stay in touch with your professors and, if needed, remind them to send you the graded Schein via email. Alternatively, professors may send them to the OSI Erasmus office directly.
You will lose access to Campus Management at some point. If this happens just contact firstname.lastname@example.org to receive a copy of your Campus Management overview.