I had someone look at me like I’d sprouted tentacles and extra heads when I told them “you dropped this” and handed back a Benjamin.
I once got $30 too much from a drive-up teller. One of the twenties was a fifty dollar bill. I didn’t count the money till the next day. I know, I should have counted it immediately but there were people behind me in line.
I took the money back the next day to the same teller. Her response: “Darn. My drawer will be off again today!” She was very unhappy.