The authenticity can be verified on Beckett Authentication Services website. This Autographed 2.75x5 Cut Signature with the inscription of "I shall be glad for the written request to be granted, if it can be consistently with the public service. June 11, 1862" has been Personally Signed by Abraham Lincoln. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.