I can only speak for IN...if I am called to private lot, we see that ins info is exchanged, simple report, NOT an accident report...now, if no ins info is provided, I can cite for that, even tow car if necessary, but that very seldom happens...if the damage is over $1000, then we will issue state forms to be filled out by each person involved, and mailed in to BMV within 10 days to make sure drivers ins follows up...so in simple words, it is a civil matter on private property, unless ins doesn't come thru