This should be under most embrassing stories,but I think you guys will get a kick out of it.
I was living in Michigan when this happened. One night I had gotten home from work and had gotten my mail out of my box. I was looking thur it and I realized that the mailman had put my neibhor's gas bill in my mail box by mistake. Being the nice person that I am, I went across the hall to give it to them,but either they weren't home or they weren't answering the door to their apt. So I decided to tape the bill to the door so that when they left they would see it. But enevlope was to thick for the kind of tape I was using. Anyway, I gave up and went into my apartment. Well about 3 minutes later, I hear a knock on door. I asked who it was and was totally surprised when it was the police. So I open the door and the police started asking me a bunch of questions(did I live there, could they see some id, yada,yada)
When I finally was able a word in edgewise, I asked what was going on. The police said that they had received a call about a prowler roaming about. Turns out that the neibhors(whose gas bill I was trying to give them) thought I was a prowler and had called the police. You should have seen the look on everyone's faces when I handed the people their gas bill.
After that, the mailman never mixed up the mail again