This was just copied from the Internet!!
Sometimes after a car accident both parties agree they would rather handle the financial issues themselves than contact their insurance companies. But, if you decide to make an agreement to receive a payment from the other person involved in the car accident or you agree to give them a payment instead of using your insurance company to handle the claim, you still need to file a crash report with the police. You don't know what the other person in the car accident will decide to do or say later. With a police report there will be a legally documented description of what occurred just in case something else come up from the car accident later.
So as far as my facts go these are not just my facts so suck a fart out of my arse! Prick.