Comment Re:Exploited procedural loophole (Score 3, Informative) 419
A simple work around is to alter the phone number on the card to a number you control.
Then the retailer could call the number receive the code from your accomplice and provide a valid false code.
The retailer doesn't call the number on the card, the retailer call's the merchant service center. For example, customer has a Chase Mastercard and when Apple tries to post a transaction the card receives a decline. Apple would never call Chase, but instead calls their provider (which at my store is First Data Merchant Services). Apple's provider in turn electronically contacts Chase and then provides an approval code back to the clerk. The customer (or scammer) never has an opportunity to change the phone number unless they physically get behind the checkout counter and overwrite the numbers that are posted for the retail clerks to use. So it doesn't matter what phone number is on the card, that number is for the customer's use and not for the merchant's use.