How can that payment machine scan the card and then how can it pay if there are no electronics in the card?
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What makes you think there’s no electronics in the card? It literally has a contact chip on it.
There’s a very small amount of data stored on your card, basically just an identification key for the bank to figure out who to bill. The terminal reads this, sends the purchase data to the bank, it sends a response back and you verify your identity with the pin. If the pin is correct, the bank bills your account and sends a confirmation to the terminal.
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