National Harbor Sports and Memorabilia specializes in ALL 100% GUARENTEED Autographs. So how do we know? We only sell autographs that are authenticated by the leading first and third party authenticators. By doing this we take out the guess work for you the customer. We only sell items that we would want in our collection. Meaning when you buy from National Harbor Sports and Memorabilia you know you are getting a real autograph, not a forgery, as there are a lot of "fake" autographs floating around on eBay. Before an item is sold, we check the online database of the authenticator, entering the unique serial number to double check that the item is entered into the database, that it is the correct item entered in the database, and we make sure it is the correct person's name. Because at National Harbor Sports and Memorabilia, Authentic Matters!!