What is the Oddest Thing in your Wallet?

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I was cleaning out my wallet last week and I found a whole bunch of junk and scrap pieces of paper in there, not to mention, all of the receipts etc... from the last week. I was also looking at my id and cards in there. The strangest thing I had was an Avengers card that came free with a Wizard Comic Magazine. It has a place for a photo, my signature and the presidents as well! What is the oddest thing you have ever found in your wallet?