Whether you leave or not, it is both criminal and civil in nature. On the criminal side, it depends on the extent of the damage as most states divide felonies from misdemeanors based on the amount of damage and in a civil case it can be a judgment to pay for the damages. Leaving the scene of an accident, if this is what you are talking about, is typically a separate offense and usually a misdemeanor. You'd have to check your local statutes and laws.
It all depends. Both you and the car that is double parked are responsible. when you do hit a car that is double parked, and the person is not at his/her car, make sure you leave a note saying that you hit his/her car. why leave a note? ITS AGAINST THE LAW TO LEAVE A CRIME SCENE!!!!!!!!!!!
It is best to leave it parked and it is possible for it to roll away, depending on the car.
You can get caught if you hit a parked car and leave if there are witnesses. Also, forensic evidence can be used to track you down.
B - leave a note
leave a note with your info or call the police
Leave a note with your name and number if you can't find the owner.
Leave a polite note on a scrap paper appologizing.
Depends on the state you are in. Some states will take your license if you are found guilty of that.
Leave your name and phone # on the car so the owner can contact you.
As long as the parked vehicle is parked properly and not illegally parked in any manner, then the vehicle that rear-ended the parked car is at fault. Now if the parked car is sitting illegally (such as double parked or parked in a no parking zone, etc.) then the parked car is at fault or even both the parked car AND the car that hits it are BOTH at fault.
Leave a note on the windshield with your contact info
Criminal and civil offense unless you leave something that would allow the owner to contact you.