FWIW, even though I didn't ask for one, I received a LOA with my photo I sent Tim Allen. Maybe because it was also signed by an astronaut? Your guess is as good as mine.

Hi FCM :)

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{star} [url=http://www.fanmail.biz/46028.html]Tim Allen[/url] on Fanmail.biz | [url=http://www.fanmail.biz/feedback/Tim_Allen.html]Previous Feedback Received[/url]

Fanmail 8)

Sent: LoR, picture to be signed, SASE on August 4th, 2017
Received: Picture signed on August 14th, 2017

Address (in database) used:

Tim Allen
c/o Boxing Cat Productions
11500 Hart Street
North Hollywood, CA 91605

Because of how quickly I received a reply and that he is rather famous, I'm not sure if this is real or not. (On the other hand, unless you don't see the person sign, you don't ever know if an autograph is real or not.) I'll count it as authentic--it matches pictures of his autographs and looks hastily done--but opinions are welcome.

Though the picture I sent was of Buzz Lightyear, Tim Allen is known for being in many other things, such as Galaxy Quest and The Santa Clause. Now that I think about it, I should've sent a picture of just himself, but whatever. I still got his autograph (I think)!

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