Abstract: A notification of an electronic transaction representing a debit or credit card, altered check amount or creation new credit/loan by other person using a stolen identity on a money transaction to be processed later, by the ATM machine, bank service, or credit/loan approval respectively for a fraudulent transaction is disclosed. A method detects a fraudulent transaction. It includes notifying customers of transactions being executed; examining a set of transaction classes (TC) which would fulfill the terms of a threshold transaction list (TTL) to determine if specified TC is a fraudulent transaction; and providing threshold transaction parameter(s) exceeded prior to realizing specified TC.