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During an offline transaction, the Point-of-Sale has no internet connection, and so the payment terminal cannot verify if the client’s payment device has been revoked.

A malicious person can use a revoked bank card to perform unauthorized transactions.

How can this be prevented?

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  • Would you mind expanding this question to cover credit cards in general and not just NFC? I was thinking about this exact question but involving swiped mag-stripe cards instead of NFC. Aug 15, 2016 at 19:36

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If the transaction is truly offline, also called store and forward in the retail space, then there is a lot of inherent risk the business is accepting. That is why almost all in person transactions involve an online authorization, which contacts the issuing bank to verify the transaction details.

I am not aware of any way to mitigate that risk in a true offline transaction scenario.

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  • Thanks for your fast reply ,really it's include inherent risk .
    – Alyaa
    Aug 15, 2016 at 17:33
  • The way you mitigate the risk isn't technical. You build it into your business cost model, either directly or through insurance.
    – Polynomial
    Aug 15, 2016 at 23:17

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