This listing is for a signed 3x5 index card by Shawon Dunston of the Chicago Cubs.  As a teenager, I wrote to a number of professional sports athletes asking for them to sign index cards, and this is one I obtained.  This signed index card is not authenticated, but based on a comparison to authenticated autographs, I'm very confident this is real.  However, I cannot guarantee 100% that this will be professionally authenticated.  This signed index card will be shipped via USPS First Class mail.