This jersey has been personally hand-signed by David Ortiz with the inscription "541 HR's." 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. Made in the USA Personally Autographed by David Ortiz Fanatics Authentic Presented by Mounted Memories Includes tamper-evident hologram to ensure authenticity Officially licensed This product is guaranteed authentic and includes a Fanatics Certificate of Authenticity and an accompanying tamper-evident Fanatics Hologram. Authenticator : Fanatics Authenticated History of item : David Ortiz has signed this item in the presence of a representative from Fanatics.