The authenticity can be verified on Beckett Authentication Services website. This Autographed Framed Display has been Personally Signed by David Crosby; Stephen Stills; Graham Nash & Neil Young of Crosby; Stills; Nash & Young. 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. This item has been professionally framed to overall dimensions of approximately 23.5 x 27.5 inches.