that happened to me at a Kangaroo mini mart. I waited for my 6 cents change since the lady gave me the receipt and shut the drawer. she was stunned i was waiting, but she opened the register and gave it to me.
Burger King does it to me when I buy a $1.27 Sausage biscuit on the way to work, and I give them a $1.30, they just don’t give you the change..................