Regardless of the type of rate, the rental agency will require a credit card as a deposit when you pick up the car. (Some rental locations may accept debit/check cards for deposits but may have additional requirements such as requesting proof of a roundtrip transportation itinerary in order to rent the vehicle.) The card must be in the name of the primary driver, and must include sufficient available credit to secure your rental. The amount of available credit necessary varies depending on the car type and rental period. If you opt to purchase additional items (such as insurance) at the rental counter, additional available credit will be required.