This Autographed 2017 Star Wars Stellar Signatures Green has been Personally Signed by Ian McDiarmid 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. Press Pass Collectibles only offers Authentic Autographs by Ian McDiarmid through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.