How do I make a complaint about an auction advert? If you'd like to make a complaint about selling at auction, please contact us directly. See Auto Trader contact details Related articles Can I have a copy of an old advert? How can I make a complaint about a dealer? What do you do with my personal data when advertising via an auction? Is an MOT required to sell at auction? How long do I need to have owned my car before selling it at auction?