You should try searching individual people and sending your requests to the address listed. Not every address will return a success. It is possible the address you used did at one time return an autograph. I probably would not have put all my eggs in one basket by sending multiple requests to the same address without testing once first. Better luck next time!

I saw posted on this website and others to use United Talent Agency to write celebrities. I am very disappointed after taking a long time to write letters that NONE were received. I called over to UTA to realize

1) They moved. The address I had is a year old.

and

2) They don't take fan mail. The girl on the phone said they take no fan mail. ALL FAN MAIL IS THROWN OUT!