One of my first jobs in high school was working at Payless.
I had a customer come in once claiming she needed to make a return. A perfectly normal looking woman, likely late 50s early 60s, she looked like a teacher or something.
I asked for her receipt, and she informed me she didn't have it. Ok – technically I can't refund them that way, but my manager was a bit more liberal and if the shoes were in perfect condition and in their original box, we might have been able to arrange an exchange. I then asked if she could put the shoes on the counter.
She told me she didn't have the shoes either.
At this point, I was as confused as you, dear reader. Yes – she tried to come in and convince me to "return" a pair of shoes that aren't physically present, and essentially open the register and give her cash out of it.
Dumbstruck, I told her "Uh – we can't do that". She proceeded to get enraged and grabbed a pair of stilettos and threw them at me before stomping out.