This game used baseball was hand-signed by David Ortiz on September 12, 2016. It was obtained under the auspices of the Major League Baseball Authentication Program and can be verified by its numbered hologram at MLB.com. It also comes with a certificate of authentication from Steiner Sports. 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.