
Some car rental companies may offer additional discounts on the rental car prices, such as hotels and restaurant coupons and tourist spot coupons, other than the regular coupons. Various establishments and business entities, like Universal Studios, Disneyland, Holiday Inn, and so on, publish and provide these discounts in cooperation with rental companies to attract more clients or visitors for their business or place.
Be sure to visit the company's homepage or forum when think you have stumbled upon a tempting special offer. There you may find more information such as any hidden charges or issues regarding the offer, which might make your mind change.
Also, sometimes in addition to online car rental coupons, you are required to provide a paper version as well. So be sure to read the blue print, although lots of companies, such as Enterprise, National, Alamo, etc. don't need a paper coupon from you.