The authenticity can be verified on Beckett Authentication Services website. This Autographed Auto Graded Gem Mint 10! Card with the inscription of "Why are you standing behind me, you putz!" has been Personally Signed by Terry McGovern of Star Wars. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.