From a reader:

Jonah:
Doubtless others will email you the same thing, but this is amazing.
Your point about the inauthenticity of photocopied signatures is confirmed by…none other than CBS’s own signature expert, Marcel Matley who “verified” the signatures!
Matley wrote in a recent article entitled Using and Cross-Examining Handwriting Experts (September 27, 2002):
“In fact, modern copiers and computer printers are so good that they permit easy fabrication of quality forgeries. From a copy, the document examiner cannot authenticate the unseen original but may well be able to determine that the unseen original is false. Further, a definite finding of authenticity for a signature is not possible from a photocopy, while a definite finding of falsity is possible.”