| 摘要 |
A portable transaction device (31) having an input keyboard (36) is connected via a telephone line (34) to a data processing centre (35), which processes input data, fed from the transaction device relating to client transactions. The transaction device sends an alarm signal (E) in response to entry of an alarm code by the operator if the operator is having to carry out a false transaction under duress. Renewal of a client's file (46) at the data processing centre is prevented when the alarm signal is received at the centre so that the false crediting of funds to the client's account is prevented. A false funds-received processing text (G) is sent back to the transaction device so that a printer (45) enters details on the client's passbook (37) as though the transaction had been carried out normally. The system therefore allows the operator to indicate that he has made a false entry under duress and the data processing centre can take action to ensure that the falsely-credited funds cannot be withdrawn by the client. On the other hand, because the passbook shows an apparently normal updating of his credit, the client is not alerted to the fact that an alarm has been given. The likelihood of release of the operator unharmed is thereby greatly increased.
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