I have found a lot of money over the years in bill breakers and machines. No more than a hundred dollar bill though. IF I know who the money belongs to because I saw them leave it, I will honestly return it. However, if you find it and do not know who it belongs to keep it without any guilt. While it technically belongs to the casino, they will put it into an account for overages and underages caused by employee theft/error. Be aware of people watching you find it, they will say it was their's as they see you find it.