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the quick and simple way to check visa or mastercard cards..

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Hi, i'm wandering about creating a small algorythm to check directly on receipt of a card number how to check if the number is correct....for a small business in vietnam with foreign customersbefore payment, just as a verification toolany ideas ?

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Hello boys,It's seems that the quickest way is by doing a small Check 10 digit algo....Seems to work, but if anybody is interested by learning the rules, I could make a quick tuto... :mrgreen:

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