What documents do I need to buy a car?

Usually you need a valid driver's license, proof of auto insurance, and a way to pay, such as a down payment, financing approval or cashier's check. If you are financing at the dealership, bring proof of income like recent pay stubs and sometimes proof of residence. If you are trading in a vehicle, bring its title or loan payoff information, registration and all keys. Requirements vary by dealer, lender and state, so ask in advance what to bring.