This template gives you everything you need for a professional, customizable and legally binding Bill Of Sale California.
Not required by law for most stuff. But if you're buying or selling a car, boat, or something expensive, get one. It proves you own it if anyone asks questions.
DMV wants to see proof you bought the car. Bill of Sale works, or use their forms. They need it to figure out registration fees and taxes.
Yes, especially for cars. Your Bill of Sale shows what you actually paid. Don't try to fudge the numbers or you'll have problems with the state.