BFG is actually great. IMO better than EVGA since you dont need to register it or anything.
BFG says that on their website, but they actually do NOT ask for a reciept. They dont really care. Just give them a call, they will RMA it no problem(As long as there is no physical abuse or anything of that nature).
"Technically" the BFG warranty is only for the original purchaser, but like I said, they dont check or care.... Its great.
XFX is the only one that has a transferable lifetime warranty. They call it their double-lifetime warranty.