Each MLB artifact is authenticated under the auspices of the MLB Authentication Program and carries a uniquely numbered hologram that allows fans to verify their item at MLB.com/authentication. MLB Authenticators witness, log, and adhere holograms to each uniform that comes out of play. Thus the details of each uniform are linked to a unique hologram number in this online database.Uniforms acquired by Tokens & Icons are then hand-cut and an MLB Authenticator affixes an additional secure hologram to the back of each pendant (just as he does with the Baseball Cuff Links shown right). This new product hologram is linked to the original artifact hologram. When fans enter the pendant's hologram into MLB's site, it reveals the player who wore the uniform and the date it was retired from play.The Major League Baseball Authentication Program is the most comprehensive league-wide memorabilia authentication initiative in professional sports. Since its launch in 2001, it has become the industry standard for game used sports authentication. MLB stations an authenticator at every game played throughout the season. This demonstrates a commitment to ensuring all game used artifacts are genuine. For more information, please visit Authentication.