I want to send an autograph request to a celeb, but idk if the fanmail address is still working. What should I do?

I really want to send an autograph request to a Disney actor, and there's an official fanmail adress, but on fanmail.biz, the last fan feedback (which is fans saying they did or did not get an autograph back) was in 2013! So I'm wondering if the address is still working or not, cause if it doesn't, who wants to waste time and money on something that won't even get where you want it to go?
So I'm wondering what to do. Should I ask somebody to send one to see if they'll get one back or not? Idk what to do.