Originally Posted by
gaidamak
If the rate is cancellable, does it mean that I need to actually cancel the back-up reservation in order to avoid any charges?
Do you contact the rental company to cancel it, or just leave it as is?
It's generally considered good etiquette to cancel the reservation you're not going to use. You can just do this by calling the company's 1-800 number (jot it down before you go). That way if the location is running desperately low on cars, they're not holding one for you that you'll never pick up.