You don't need to register. Avis keeps track of your rentals and your hometown using your wizard number and your first qualifying rental will mark the beginning of a six-month window within which two more qualifying rentals must occur to earn a free weekend certificate. If you don't rent a sufficient amount within the window, your qualifying rentals expire for the purposes of the program.

Most people don't even know about the scheme until they make a qualifying rental and the Avis superdupercomputer generates a welcome mailing, including a nifty Weekender Club membership card that is suitabe for framing.