To legally transfer ownership and register the vehicle in your home state, you must obtain the following from the seller at the time of purchase:
If you plan to drive the vehicle back to your home state, you need a legal way to operate it: How to Sell a Vehicle - Iowa Department of Transportation buying a car in iowa from out of state
Buying a vehicle in Iowa to take back to your home state involves specific documentation and temporary transit steps to ensure you stay legal while driving across state lines. To legally transfer ownership and register the vehicle
: This must include the purchase price, VIN, date of sale, and signatures from both the buyer and seller. date of sale