This cannot be in any way legal.
Had a guy yesterday send me a link to a video site talking all about how people are sending FedEx envelopes full of money. I'm not kidding, I got paranoid "The Man" would kick down my door just for having watched this freakish thing... (Cleaning my history as I type)
Seriously, this cannot be legal and no I'm not going to post the link. It's too evil.