A while ago (I'll get the dates later) I sent Tina Fey of Mean Girl, 30 Rock and Saturday Night Live fame a letter of request and a self-addressed stamped envelope,
and within this past week, she sent me back a pre-printed signature with a real personalization to my friend Luke (kinda disappointing). And she also included a file folder as a cardboard thingy in my SASE.
I used the address in the databse:
Tina Fey
"30 Rock"
NBC TV
30 Rockefeller Plaza
New York, NY 10112-0002
USA
Here's the autograph:

Here's my envelope: (even though I don't really like posting my envelopes)

Thanks,
Victor