The authenticity can be verified on Professional Sports Authenticator website. This Autographed Auto Graded Gem Mint 10! 2.75x5.5 Cut Signature with the inscription of "Pecuniary independence give moral and social power. The Riggs House Washington DC January 2, 1184" has been Personally Signed by Susan B. Anthony. This item is 100% Authentic, it comes slabbed and authenticated by PSA/DNA. The authenticity can be verified on Professional Sports Authenticator website.