Comment on Mailcheck.js - How we decreased sign up confirmation email bounces by 50%parentComments−FireBeyond14y"Even better we were able to get rid of the 'select your card type' field since that was detected by Luhn."FYI: Card Type is not determined by Luhn algorithms, but rather (broad brush strokes, see http://en.wikipedia.org/wiki/Bank_card_number#Issuer_Identif... for more detail):3 - American Express 4 - Visa 5 - Mastercard / Diners 6 - Discover
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"Even better we were able to get rid of the 'select your card type' field since that was detected by Luhn."
FYI: Card Type is not determined by Luhn algorithms, but rather (broad brush strokes, see http://en.wikipedia.org/wiki/Bank_card_number#Issuer_Identif... for more detail):
3 - American Express 4 - Visa 5 - Mastercard / Diners 6 - Discover