This Autographed 4x6 Photo has been Personally Signed by Dennis Johnson of the Boston Celtics. This item is 100% Authentic, it comes slabbed and authenticated by PSA/DNA. The authenticity can be verified on Professional Sports Authenticator website. We only offers Authentic Autographs by Dennis Johnson through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.