This Autographed Game Worn/Issued Black Champion Size XL Jersey has been Personally Signed by Boomer Esiason of the Cincinnati Bengals. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website. The jersey comes with letter of authenticity from Shaquille O'Neal for the provenance as well. There is no paperwork on the game issue however the tagging matches known exemplars, due to that and the provenance of the item we do believe it is in fact game issued.