This is really scary stuff. Apparently people have been stealing cars and replacing the VIN's with VIN's from legal cars. Carfax report comes back clean and people buy the cars without any worry. But later on they find out their VIN was replaced and suddenly they find their car impounded, given back to the original owner and they STILL owe payments on it. After all, being scammed isn't covered by your insurance most of the time. FBI breaks up $25 million 'car cloning' ring - CNN.com So if you are buying a fairly expensive car, have it checked out extensively before you sign the papers. You don't want something like this to happen to you.