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 >> Card Verification Value

in Excel -- free.
Also use it to calculate statistical accuracy based on the response group size.
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Survey Workshops
Learn how to conduct a survey project from questionnaire design
to survey administration
to data analysis.

Next Workshops
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May 11-13, 2015, Dubai
June 22-24, Dallas, TX
Late July, Singapore
Early August, Kuala Lumpur
Early November, Syndney
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The Card Verification Value or Card ID helps prevent fraudulent use of credit cards.  It is a required field for purchasing on Great Brook's order forms.  Below are examples of how to find the number on different credit cards.  

The CVV or CVV2 number is printed on a MasterCard orVisa cards in the signature area of the back of the card.  It is the last 3 digits AFTER the credit card number in the signature area of the card.

On American Express cards, it is a 4 digit number on the front of the card above the credit card number.
On a Discover Card, the Card Identification Number (CID) is on the back of the card in the signature area similar to a MasterCard.

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