"To add full credibility to your Certificate, you should have a supervisor to watch over you when taking the exam.You must pick your own supervisor.The supervisor should be used to see that you do not cheat. There are no other special criteria for the supervisor.The supervisor's name and title will be printed on the certificate, so it could be wise to pick a supervisor who will add credibility to your certificate (e.g. your boss or teacher).When you receive the hardcopy of the Certificate, you should ask for a signature from your supervisor." is what i mean is the supervisor needed?