Astronaut Henry W. Hartsfield used at least two autopen examples during his career as a space hero.  These autographs are still floating around and some may find their way onto eBay.  Collectors should be aware of the risk with Hank Hartsfield signatures, especially with NASA Space Shuttle flight items from STS-4, STS-41D and STS-61A.

This Guide will reproduce two examples of his autopen autograph.  This comes from the archives of Space Autograph News, an underground and out-of-print newsletter published in the 1990s.

An autopen is a machine-generated signature used widely by celebrities and politicians in the previous century.  These fake autographs were sent by the thousands in response to fan mail.  Early NASA astronauts were known to use autopens, so careful collectors always watch out.

I've written a complete list of 102 astronauts known to use autopens. 

Some people hate me for publishing this Guide.  Check out my horrible feedback!  But I don't care.  You deserve to know about fake autopen signatures.  Even if nobody leaves me positive feedback, I still believe that sharing this information is the right thing to do.