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?