Thought I would share a recent issue with PSA. Came across this Ebay listing and thought it was a steal, as the item description, and the PSA sticker confirmed that the signature was that of Lee MacPhail, however, I noted instantly that it was actually his HOF father, Larry. So I snatched it up.
I noted immediately that the signature was TOO perfect, especially for being on thin typewriter paper. I learned that the signature was actually a stamp and immediately called PSA and sent them my photos. I told them they had the wrong person and the item was not authentic. A week later I get a call back that yes, the signature was Larry (which the updated) but signature was authentic.
Fortunately I explained all this to the buyer and he had no problem issuing me a full refund and said that the letter will not be offered again as a genuine signature.
Some photos:
"signed" letter (sorry sideways)
PSA "Verification" of "Lee" MacPhail