Not a bank - but a while back I paid for lunch with a $50 - they were short handed and she was runnng hard.
… started to put the change in my wallet and realized she got $100 in her head - returned the 💵
I had the opposite happen I paid with a 100$ at steak on a stone (a semi-fancy restaurant)
Not trying to be more than descriptive but my server looked straight out of the uh.. trailer park and 8+ months pregnant.
service was slow to non-existant.., but I felt bad she had to be working while that pregnant.
After 15min she came back and gave me change like I paid with a 50$
I said It was a $100 bill she denied it and after a short wait the manager called me a Lier.
It takes alot to really make me blow up in public I tend to just write it off as a bad experience and move on ,but
I had no 50's in my wallet.. I KNEW it was a $100 bill 100% sure.
so I let him have it in front of about 40 other patrons.
He counted the drawer and found I was right and apologized.. sorta.
They went under a month later.(unrelated probably