Some companies now have frequency programs to earn points redeemable for rental credits or merchandise. In most cases, you can download program enrollment forms from the company's Web site, then fax back or pick up a form at the airport counter. Here's how the programs stack up.
Members use a special toll-free number for reserving.
After completing a Master Rental Agreement, members access separate counter areas or a kiosk. For facilities that require shuttle service, members are driven right to the car, with keys and rental record waiting. Points may be redeemed for rentals, upgrades, and merchandise. Members earn points for qualifying rentals. Members' point tallies can be checked online.