anything over 5$ i'll say something. Just the other day, I dropped off 170$ in halves at a TD bank. During the bag change, the machine's screen malfunctioned. The CR that helped me hit the power switch on the side. In the end, I got a ticket saying 111$. feeling something was not right, during the cash out i told the teller that I feel like it should have been more and could she check the machine? She was nice about it and went and checked the reject and did a audit of the machine. Printing out the transactions, checked the last two transaction and there was a 59$ transaction just three minutes before my final ticket. She did her thing and gave me all my money. My best advise, if you feel/know the machine shorted you. Bring it up in a nice way, dont go yelling and demanding that you get your money back. Chances are the employees are more that willing to help you.