Do I have to use the Emerald Club code to take advantage of the free extra driver? I just signed up for the Emerald Club on Turners. I tried checking rates with the Emerald Club Contract ID with other coupons and found the rates were higher than when I use the Carlson Contract ID with coupons. I want to take advantage of the free driver benefits from the Emerald Club and was hoping I could just show my card at time of rental after booking it the cheaper way.