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2. Luhn algorithm - Wikipedia

   en.wikipedia.org/wiki/Luhn_algorithm

   Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in U.S. Patent No. 2,950,048, granted on August 23, 1960.

3. Credit card fraud - Wikipedia

   en.wikipedia.org/wiki/Credit_card_fraud

   Credit card fraud is an inclusive term for fraud committed using a payment card, such as a credit card or debit card. [1] The purpose may be to obtain goods or services or to make payment to another account, which is controlled by a criminal. The Payment Card Industry Data Security Standard (PCI DSS) is the data security standard created to ...

4. Wikipedia

   en.wikipedia.org/wiki/Real-valid-credit-card...

   Wikipedia

5. What Is a Billing Zip Code? How To Find Yours for Your Credit ...

   www.aol.com/billing-zip-code-yours-credit...

   123 Example Street. Beverly Hills, California 90210. Your billing zip code, or credit card postal code, is the five-digit number on the bottom right, which in this sample is 90210. This would be ...

6. Should I get a student credit card? - AOL

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   A student credit card is a big deal. Here’s what you should know before getting one. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

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