: If the chip of a credit/debit card is not internet connected, when you block it via The Mobile Bank app, how does the contactless POS knows that your card is blocked?
In: Technology
The POS system is connected to the Internet and have contact with your bank. And it is able to relay messages between your bank and your card. During a transaction there are many messages being sent between your bank and your card through the POS system before the transaction completes.
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