Obama's signature: Is it real or is it autopenned? (AP)

In this photo taken June 13, 2011, Damilic Corp. president Bob Olding anchors the paper as the Atlantic Plus, the Signascript tabletop model autopen, produces a signature at their Rockville, Md., office. Damilic Corp. is the leading manufacturer of automatic signing machines for replicating authentic signatures. Autopens have been used for decades by presidents of both parties, an open secret nobody in Washington wants to talk about, including the White House. (AP Photo/Manuel Balce Ceneta)AP - It's the open secret that nobody in government wants to talk about: That cherished presidential signature that's tucked away in a scrapbook or framed for all to see might never have passed under the president's hand.