I've been looking through early Al Pacino autographs (where  his signature still looked close to a name rather than a squiggle).  Here are two identical signed documents offered by two different sources. 

    The first comes from History For Sale and is on their website.  The second with the PSA sticker attached is offered in the latest Pristine Auction.  These are described by Pristine as "a contract amendment for the movie "Serpico" signed on July 24, 1972 in black ink pen by actor Al Pacino and producer Martin Bregman".  Both look like what appears to be fax paper. 

    At first I thought it was the same document until I saw the sticker on the Pristine. The slants are the same on the signatures and lines from their names are almost perfectly one atop the other and even touch and intersect in the same places (that's the part that leaves me wondering).  Still, looking very closely, you can see some just very minute variations.

    Any thoughts on these taken together?  I don't know why the same legal document would be replicated for signing. Maybe others have seen this before?