The authenticity can be verified on Beckett Authentication Services website. This Autographed Auto Graded Gem Mint 10! Card with the inscription of "Is Darth Vader (Prowse), Admiral Piett (Colley)" has been Personally Signed by James Earl Jones, David Prowse & Ken Colley 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.