I am surprised that your marketing department decided to move forward with this... Using rlcarey's example is just one justification to not go forward with this. But im sure at your FI, like mine, Marketing carries the bigger stick.
I would ensure that security at the ATM area has been reviewed, lighting, cameras. Ideal place for robbery, you know that most people are going to take out more than usual because of promotion.
Also there is threat of employee theft, unsure how you fund atm, my FI, dual control two employees, but there could easily be collusion,
example, supposed to put one hundred $50 bills instead of one hundred $20 bills. Me and my fellow employee take fifty $50 bills and replace with fifty $20 bills of our own money.... no one would ever know. employees split profit 50x30=$1500 $750 each
Last edited by Othom; 12/15/14 05:21 PM. Reason: clarification
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Giving my two cents, which you can take to the bank, or wait for other's before going.