The greatest costly mistake I committed in my place of work was when I mistakenly loaded 1000 denomination into 500 ATM cassettes. Almost like 25 withdrawal transactions belonging to other Banks customers had been performed before we noticed. Unfortunately, they did not inform us that the machine was overpaying them. I had shortage running into N325,000 that day. I had to quickly borrow the sum from a cooperative society to balance the ATM account.
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badoh:
The greatest costly mistake I committed in my place of work was when I mistakenly loaded 1000 denomination into 500 ATM cassettes. Almost like 25 withdrawal transactions belonging to other Banks customers had been performed before we noticed. Unfortunately, they did not inform us that the machine was overpaying them. I had shortage running into N325,000 that day. I had to quickly borrow the sum from a cooperative society to balance the ATM account.
Share yours.

but was the transaction later traced?? I mean the customers that made the withdrawals

We later recovered some amounts when we escalated to those Banks while the remaining amounts could not be retrieved due to the fact that customers accounts were unfunded.