You do need bill of sale. You may want to write up an extra thing that both of you sign to CYA but that's not for the DMV.Does a vehicle bill of sale have to be notarized in California? No. When you privately sell a car in California, the Bill of Sale does not need to be notarized. No. A bill of sale refers to a legally binding document that confirms that you actually bought that vehicle from a private entity or party. A bill of sale is a legally binding document that shows in writing the sale or transfer of personal property from one party to another. California Bill of Sale Forms (3). A California bill of sale is an official document used to record the sale of personal property between a buyer and seller. Stevens Creek Toyota is your source for new Toyotas and used cars in San Jose, CA. Browse our full inventory online and then come down for a test drive. Usually the tenant or seller takes care of utilities, garden, pool maintenance, etc.