Certification number can be verified online. Julius Erving signed 11×14 autographed photo “1983 ASG MVP” inscribed JSA. Hand signed by NBA Champion and Hall of Famer of the Philadelphia 76ers, Julius Erving. Authenticity Item has been authenticated by James Spence Authentication (JSA). This certified item was autographed in the presence of a JSA representative. A tamper-evident label is affixed on the item. This item will include a JSA Witness Certificate of Authenticity with identical matching certificate number on both the item and the Certificate of Authenticity. The authenticity can be verified on the JSA website. About JMJ Authentic Autographs. Thank you for visiting JMJ Authentic Autographs. I have been in the hobby since 1993 and offer authentic signed Sports and Celebrity collectibles obtained in-person at various sports and entertainment events and during private signings. As a collector of Sports and Celebrity Memorabilia myself, I know firsthand the importance of authenticity. I can provide detailed information on when and where any specific item listed in my store was signed. All items are authenticated by the most recognized autograph authentication companies in the hobby today: Beckett Authentication Services (BAS), Professional Sports Authenticator (PSA/DNA), James Spence Authentication (JSA), Fanatics, Tristar Productions, Upper Deck and Steiner Sports. Please see my feedback to view my track record of excellent customer service and authentic memorabilia. _gsrx_vers_1653 GS 9.7.5 (1653).