What is the law on hitting a parked car in a parking lot in IL?

The law says that if you can't find the driver you should leave your name and contact infromation on the vehicle you hit so your insurance can pay for the damage. If you don't and the owner files a police report and they find you the consequences can be brutal. Not only will you pay for the damage out of your own pocket (because if you didn't report it, your insurance will not cover it after the fact) you may also face civil penalties as well. Besides... If you hit someone else's car it's the right thing to do.