The staff at the counter should hand over some document, which confirms that car was handed over

While booking the car online, the deposit amount was not mentioned as 5USD, where as when we took over the car, the amount blocked on my credit card was around USD700. I believe they should be transparent regarding the deposit amount, during the time of booking online. Also during the hand over of the card, I was not given any document which says that I handed over the car in proper conditions & the fuel tank was full during the hand over. A confirmation document should be given to customer when the car is dropped off.