Easy Credit Card Verifier - Version 1.13 Avoid credit card merchant fees when submitting a wrong credit card number for your customer order. Easy Credit Card Verifier instantly checks credit card numbers for validity using LUHN10 algorithm. Using this software you may check MasterCard, VISA, Diners Club, EnRoute, Carte Blanche, AMEX, Discover, or JCB credit card numbers without submitting them online.