I sent LOR, SASE, and photo on 11/15/18 and on 12/3/18 I received my photo back signed as well as a thank you card for my letter and $25 donation I included with my request.
I used the following address:
Annie Potts
Tres Palmas, Ltd.
16 S Oakland Avenue
Suite 200
Pasadena, CA 91101-2041