key instead of responding to a request from the machine.
The ATM will communicate each transaction to the bank and obtain verification
that it was allowed by the bank. Ordinarily, a transaction will be considered complete by
the bank once it has been approved. In the case of a deposit, a second message will be
sent to the bank indicating that the customer has deposited the envelope. (If the customer fails to deposit the envelope within the timeout period, or presses cancel instead, no
second message will be sent to the bank and the deposit will not be credited to the customer.)
If the bank determines that the customer's PIN is invalid, the customer will be
required to re-enter the PIN before a transaction can proceed. If the customer is unable to
successfully enter the PIN after three tries, the card will be permanently retained by the
machine, and the customer will have to contact the bank to get it back If a transaction
fails for any reason other than an invalid PIN, the ATM will display an explanation of the
problem, and will then ask the customer whether he/she wants to do another transaction.
The ATM will provide the customer with a printed receipt for each successful transaction
The ATM will have a key-operated switch that will allow an operator to start and
stop the servicing of customers. After turning the switch to the "on" position, the operator
will be required to verify and enter the total cash on hand. The machine can only be
turned off when it is not servicing a customer. When the switch is moved to the "off"
position, the machine will shut down, so that the operator may remove deposit envelopes and reload the machine with cash, blank receipts, etc.