My plan is to write a random adress without stamps and write a return adress from another country.(I live in Canada). So if you want to participate in my test, all you have to do is PM me your full adress and I might post you something to test it out(OMFG RANDOM STICKERZZZZ !!!!!!) . I'd like adresses from people very far away from me like Japan, NZ or Australia. I'll keep you updated as soon as I have results !