Never lost any $$ unconsciously to my knowledge. I got grifted once, for $20. I learned from that though, so I guess it was $$ well spent. I've only found $5 at once to my recollection. Since it was under a chair in an empty lecture hall, I had lunch on the cheap for a couple of days. I figured $5 was way too little money to worry about. If it was $100 I would have considered turning it into the cops.