When working for a national auto repair store, a guy came in and asked if he could do a warranty return his battery without a receipt.
I told him the best I could do is a return based on how old it was. Well, the battery was over ten years old (there’s a date-code sticker on them), obviously well-used, and the plus was, it wasn’t even our store’s brand!
He kept insisting he’d just gotten it as a gift the month before!
I told him, and the manager told him, that he was SOL for the named reasons.
He finally slammed his fist on the counter and screamed, "You sell batteries! Who FUCKING cares if it's your brand or not?! You have to take it back! That's customer service!"
He was told that he had ten seconds to get the fuck out of our store... by one of the mechanics who looks like he bench presses a truck in his free time.
Never seen a man run so fast.