Vehicles are required to be titled in the buyer's name within 30 days from the date of sale. If you bought a car without a bill of sale you cannot get a bonded title.You bought a liability. Some states will accept a bill of sale. All vehicle registration and title transfers require proof of insurance and a current vehicle inspection that is no more than 90 days old. Buying a car without a title is a risk, and will require extra effort to get a valid title before you can register it.