The Iowa Department of Transportation is warning people to take caution when shopping for and purchasing a vehicle from an online seller. The DOT recommends you take your time and research a specific make and model of a vehicle, or a certain dealer. They advise most reputable dealers will provide documentation to certify the authenticity of the vehicle title and any previous damage. If you do buy from a private party, make sure the vehicle has legitimate documentation. Don’t be afraid to ask questions and get more information from the seller. The DOT’s website can assist in buying or selling a vehicle. If you feel you’ve purchased a vehicle that may have had the odometer rolled back or the vehicle’s identification number was tampered with, contact the DOT’s Bureau of Investigation and Identity Protection 515-237-3050.