Why thief???
You give MVitaliyB money, and hi not return their... BAD PERSON - not thief!!!
Malfunctioning ATM takes guy's debit card. Guy at ATM parks and goes into the office to talk to tellers. You pull up and see his account still up - and there's the "Quick Withdraw - $300" button on the screen. Is it not theft if he "gives" it to you by accident when you click the button to take what you know is his?
If the programmer in bank commits a mistake in an initial code and through his fault the ATM gives out to the client not $100 and give out $1000 and thus the client disappears, how you think who will indemnify a loss?
Only in this case I am ready to compensate, but only way only available to me, at present!