I have reason to suspect the Roger Clemens autograph I received in the mail today (took 19 days by the, in case you were curious) is a preprint or something along the lines of that. The lines are kind of fuzzy (but it's not Autopen) and the colors of the photo are visible through the ink. Here's a picture:
Also, I used the address in the database. I sent two cards, he didn't sign them and it came with a note saying why he couldn't sign, but apologized sending this autographed photo. Another cause for suspicion is the fact he charges one hundred dollars for autographed 8x10.
I got the same one back today. I sent my LOR, card and SASE on 6/21/12 to the Foundation address. There are some slight differences in them if you look.
TTM Successes: Derek Jeter, Joey Votto, Cliff Lee, CC Sabathia, Jorge Posada, David Wright, Curtis Granderson, Chase Utley, Bobby Doerr (HOF), Roberto Alomar (HOF), Wade Boggs (HOF), Josh Hamilton, Roy Halladay, Mark Texiera, Curtis Granderson, Paul O'Neill, Tino Martinez, Mike Mussina, John Smoltz, Ryan Zimmerman, Doug Harvey (HOF), Pat Gillick (HOF), Steve Buscemi, Robert Redford, Jim Bunning (HOF)
In Person (non-paid): Lawrence Taylor (HOF), Wade Boggs (HOF), Carlton Fisk (HOF), Michael Jordan (HOF), Bernie Williams, Mike Schmidt (HOF), Bob Feller (HOF), Bobby Doerr (HOF), Phil Rizzuto (HOF), Ralph Kiner (HOF), Warren Spahn (HOF), Sparky Anderson (HOF), Lou Pinella, Ron Guidry, Early Wynn (HOF)
I recived mine back today as well, for the second time though and both signatures are extreamly similar but they do have their differences.
So as far as I'm concenerd they are real, congrats on your success!