Relative newbie here...I used a coupon code for Avis.com, and although it seemed to accept the code (it declined a few others) the rate didnt change. So do I not get to know the rate until I show up at the counter, or do I assume the coupon didnt work?

BTW I made a reservation for the same car through AAA.com (at Hertz) and the rate was nearly a hundred dollars less for a 2 wk rental.

Thanks for any info.