well there is this whole process of the school recieving the certificates, they lie around in the office for a week, then holiday hits, then term starts again, after a few more weeks they are found again and passed to your maths department. then your maths department cant be bothered sorting them out into classes. Eventually they give most of them back and possibly lose some in the process. seriously though, my school maths department still have certificates back 3,4 years ago in some random huge stack.