[Bruno85]

Depends on how you see it. You can order a controller, say it doesn't work and ask for a refund. I think chances are higher you'll get money back if you buy it than get it for free with a fake receipt.

could i use this method using just a fake amazon receipt?

Well yeah you could, but I wouldn't recommend it. I guess you can always try though. Why don't you get the serial number from a friends controller or something?

What would you recommend? I really want to see if i can get a new controller for my PC, mine is dying.