I reserved and paid for my 1 day rental online thought Hotwire. I included the insurance in my reservation too. I was under the influence that everything was PAID IN FULL. When I arrived they wanted to put a $200 hold on my card. There was nothing in my confirmation email stating this so I didn't anticipate it. My bank is a local state bank (NV) and since I don't live in Charlotte, I couldn't deposit additional funds on that card. We had transferred money to our Bank of America account to prevent this type of issue.
I showed up by myself with my card that the car was paid for on. Long story short I had to cancel my reservation because I did not have an additional card on me to have the $200 hold put on.
Moral of the story, always bring a back up card even if you've already paid in full.
Oh and be knowledgeable of your reservation details. Especially on the insurance!!! Even though I had already paid for the rental insurance the guy at the counter tried to sell me more. They make money off of those up sells! A basic one is always good so you aren't charged for the downtime of a vehicle IF you're in an accident.
He also tried to sell me their gas refill program (not sure on it's actual name). Where you can prepay gas at a "discounted" rate. Told me I couldn't find anywhere in town with their low or a lower price. So I pulled out my phone, checked my Gas Buddy app. Sure enough there were gas stations with the same rate. Wonder if they make money on that too?
I don't mind filling up on my own so prepaying gas was not something I needed.