I received my phone bill and realised an error which leads to about a $30 discount for me. The bill states I paid $60 last month for a $30 bill, yet when I checked I had only paid the required amount of $30.
I asked my friend and he told me to just play dumb and pay whatever the bill requested. He told me about how he was at the casino once and the cashier gave him an extra $500, but he only realised a few minutes after walking off with the money.
So, what would you do in these types of situations?