LOL I don't know for sure. I think three times. The postmarks on the reverse are Milwaukee, Wi. Jan 1, 1980 and the second is Fond du Lac, Wi, Jan 18, 1980. I got the cover from an employee of the Reporter so I know it got delivered. My guess is that it got returned at least once before someone pointed out that the stamp was on the reverse.
Here's someone else who didn't have a good day. A machine cancel and a hand stamp. Both are dated Nov. 6, 1978 so I presume the post office noticed it before sending it back.
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