Carfax for free - People interested in buying a car can choose to buy a used car to reduce costs. It is important to understand the history of a used car to avoid unnecessary complications in the future. Most buyers will depend on the information provided by previous owners on various issues, such as damage, theft insurance, and so on. The vehicles are fitted with VIN or vehicle identification number used by the authorities to record any incident involving the vehicle. Several online services provide information that enables potential buyers to run a check and report on the car title history with the help of VIN.