Identification code determining apparatus for use in transaction processing apparatus

摘要

A transaction processing apparatus permits transaction processing when using a record medium in which customer identifying information is recorded and an identification code entered by a customer is valid. Determination of validity of an identification code is made when a correct identification code is entered while less than a predetermined number of erroneous entries are made, or when a correct identification code is entered within a predetermined time in the case of erroneous entries in excess of the predetermined number. In case that an erroneous entry is again made after more than the predetermined number of erroneous entries the predetermined time period during which it is permitted to determine validity of the entered identification code is increased to a longer time period as the number of erroneous entries increases. In addition, in case that the number of unconditionally acceptable erroneous entries exceeds a relatively large number of times, the record medium is registered as an invalid card.