This bat has been personally hand-signed by Derek Jeter, David Cone, Bernie Williams, Luis Sojo, Joe Torre, Jeff Nelson, Andy Pettitte, Mariano Rivera, Paul O'Neill, Mel Stottlemyre, Chuck Knoblauch, Scott Brosius, Chris Chambliss, Jorge Posada, Darryl Strawberry, Joe Girardi, Tino Martinez and Ramiro Mendoza. It has been obtained under the auspices of the MLB Authentication Program and can be verified by its numbered hologram at MLB.com. It also comes with an individually numbered, tamper-evident hologram from Fanatics Authentic. To ensure authenticity, the hologram can be reviewed online. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.