Authenticating the signatures of American Presidents is an arduous and time consuming task. You have to examine the paper stock, the ink, the flow of the ink, the age of the paper, the curls and peculiarities of the letters and characters and compare them to known examples. But sometimes it's easier than you think. Like today. A very nice lady sent us a photograph of a Franklin D. Roosevelt signature on a commemorative cover (envelope) which she said "looked good". Indeed the paper looked good, the signature was bold and clear. But we didn't really have to look very hard to determine it was truly not an original signature of President Roosevelt. How did we know? Because the postmark on cover was 1966. President Roosevelt died in 1945. So as the veteran newscaster Paul Harvey would have said, "now you know the rest of the story" :)