<prompt> Human: So today I went to the bank machine to withdraw 500, but came out in all 20 bills. So I went up to the teller to exchange it for 100 bills. For some unknown reason she came back with 2500 and was about to give it to me until I asked her if she was sure that she counted it right. Of course she realizes her mistake and is thankful that I asked, but what wouldve happened if I were to take it? I didnt give her my bank card so how else would the bank find who or where their short money?  <response>: So many cameras in a bank - practically every inch is being monitored and recorded. Once the teller came up short, they would have reviewed the recordings of her transactions until they found the one where she gave out the money, followed you in the recordings back far enough to see you making an ATM withdrawal, marked the time, and reviewed the ATM transaction records until they found the withdrawal in the system. They now have all your bank information, including name, phone and address, as well as a recording of you walking off with their money.Keeping the money counts as theft and is subject to legal action. 