My brother just went through something like this,
the teller would not believe she had over paid him
by $20, my brother insisted, she didn’t want to
count the drawer. Finally she did and it was
$20 short. Proud of my Bro, and he needed money
at the time too.
Sounds like a good man.
My older brother had a policy, never trust an ATM further than it can be thrown. I never had an ATM cheat me, ever. Decades ago one of them gave me, IIRC, $10 too much, more than it had deducted from my account. I took that physical $10 bill back to that bank and they said thank you and that was the end of it.