>Hi all,
>
>Where can I find algorithm to validate a credit card number? I found some on internet, but it validate only the 16 digit card number. I'd like to be able to validate the date and the number on the back of the card
>
>Thanks

Usually merchant account and CC "vendors" will provide the "checksum" algorythm. Are you "just" trying to make sure the number is legitimate before you pass it to the merchant account - or - is your app the merchant account?