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

[iGuest 3]

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 ?

[iGuest 3]

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:

[iGuest 3]

Its called the LUHN formula

http://forums.xisto.com/no_longer_exists/

[iGuest 3]

use a paypal system