Noon in New York City: A customer withdraws $500 from an ATM using a credit card, a common practice in any metropolis. However, moments later an online purchase is made using the same credit card number on a computer in London. Luckily for the unassuming customer, the billing and monitoring system terminates the transaction. As soon as two transactions on the same credit card are logged within 10 seconds of each other at different locations, an automatic block is instantly applied and the responsible department is informed of the possible fraud.

 

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