How to easily read Security Digit

To decipher the Security Digit, you should first learn how to understand what it is. The PIN is a numerical code that is used with debit cards to authorize cash advances and withdrawals from ATMs. The Security Digit is used to verify the identity of the cardholder online. Discover it(r) Cards have a series of numbers printed on the back. These numbers can be found on the signature strip of the card and are often the last three digits of the credit card number.

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