About a week ago or so I won a coupon from the Voss instant win game. Which I received today in the mail but the envelope was opened. I recently got a new mail man. I was curious has anyone mail ever been obviously tampered with if so how did you handle it and how did you stop it from happening again. I cant prove anything and it was a coupon so I dont want to stir up any trouble but if anything of real value comes I want to make sure this never happens again any advice?