A friend of mine was working selling computers etc. at one time, and a man that was plastered came in and bought a lot of expensive equipment. He sent someone else in the next day to return it all.
When working at Domino’s a few years ago, my daughter had a guy offer her a baggie of pot in exchange for a pizza. He waited around for her to “make” it.
Then, out of the blue, in walk the police.
Turns out it was even fake pot.