I have a magento site connected with credomatic bank using CUSTOM CODE, its works with Visa Cards but when i use Amex Cards it says "Please enter the cvv code" so the system only works with three digits. Also i need to add the "Name" field tho the payment form. Please only bid if you are expert, i had bad experiencies with some freelancers here. i have lost money and time.
its not only to the system works with 4 digits, its that the Amex cards Works Well with magento and send process to credomatic system .