If he's threatening you, then he's also probably laughing about you behind your back, "the sissy is afraid of me... he'll never get his money, he hasn't got the balls." Let it bounce, make a photocopy of the statement from your bank that says it bounced, send him the photocopy by registered mail. Ask him to correct the problem within a certain amount of time, and ask for him to pay your bank fees as well for the bounced check. Include "this matter will be turned over to the police on..." such and such a date. That usually works at the restaurant I work at. We get 1 or 2 bounced checks a week... all but 2 or 3 have been resolved without police/courts during the past 4 or 5 years. Of those not resolved, one was from a crack-head who claimed her checkbook was stolen (it was her handwriting), and the other was a forgery; that one's still going through the courts. I was suspicious, wrote the car's license plate number on the check, and that's how the police caught the forger 🙂