1. Contact the police. The police may be able to assist you in locating the car and returning it to the rightful owner. They can also help to deter the repo man from taking any further action.
2. Contact the lender. The lender may have some suggestions on how to get the car back. They may also be able to work with the repo man to arrange a payment plan so that the owner can keep their car.
3. Hire a private investigator. A private investigator may be able to track down the car and negotiate with the owner to return it to the lender. This can be a costly option, but it may be worth it if the car is valuable.
It is important to remember that repossession is a legal process and should only be used as a last resort. If you are considering turning someone in to the repo man, it is a good idea to talk to a lawyer first.