You must have registered for a class "with a certificate".  If you attend 75% or more of the class time and make an 80% or better score on your test, you will receive a certificate of completion in the mail at your home address within 2 weeks of the end of class.  If you do not pass the test or are unable to get the class time in, you will be given the opportunity to retake the class within the year when it is offered.