You're at the grocery. The cashier goes to give you a $20 bill back as part of your change but you later realize that there were 2 bills stuck together so you got an extra $20. What would YOU do?
I don't ever count my change, because I don't want to hurt cashier feeling.
I don't want her or him to think I don't trust them.
So if the cashier gave you $20.00 too much back, you're hurting her feelings? lol....