For Security Code on MasterCard, Visa and Discover look for the last 3 digits on the Back of the card in the signature area.
For American Express the Security code is a 4 digit number printed on the front as shown here:
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For Security Code on MasterCard, Visa and Discover look for the last 3 digits on the Back of the card in the signature area.
For American Express the Security code is a 4 digit number printed on the front as shown here:
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