I want my friends from out of country to help with my film?

I'm 16, and I'm making a documentary..I want my friends (that i met on
the internet, i admit) to be in it too, as well as my friends in my
town. However, because they'd have to sign release forms and send them
to me, I'd have to give them my address, which my parents wouldn't
allow. Can anyone think of any way to do this? Is there some way they
can send stuff to my town, but not my address, or something that my
parents would be ok with?
yes, I plan to have them film themselves after i send them the
questions...the problem is the release form...I need a way to have
them sign a release form (which i can send them over the internet) and
then send it to me (which i don't think can be done online, because of
the signatures, obviously)