Credit card pre – authorization is a hold to the credit/debit card which, instead of debiting funds from the cardholder, puts a temporary block on a certain amount.  Depending on accepted insurance option and vehicle group the lessee will provide security deposit in the amount of franchise. Security deposit is blocked/held until the end of the rental and is returned/unblocked when the vehicle is checked in at the same condition as it was when checked out.Unblocked security deposit, depending on bank, takes from 24 hrs up to 30 days to be available to a lessee.