Bit of a strange turn of events regarding the drier replacement parts...
So to fix the drier I bought a motor from a parts warehouse. I noticed the motor box came with a return label, but figured that was only in the event that I needed to return the part for some reason. Installed everything and a week later I get an email with return instructions, totally unprompted and with vaguely threatening language like "PLEASE DO NOT DEFACE OR WRITE ON THE MANUFACTURER SHIPPING BOX". I replied to their service department and said I never applied for a return/refund and the part is in-service. They kindly replied that it was their mistake and to disregard.
Cut to last night when I get a PayPal alert that I have a refund pending for the amount of the motor (less shipping). Along with two separate emails) one computer-generated and one from what looks like a human) saying they are pleased to have processed my refund.
So at this point I keep the money right? Am I legally obligated the return it if they realize their mistake?