We use the most secure method of transmitting credit card details online: 128 bit secure Socket Layer (SSL) encryption that scrambles the number when transmitting it to your card company. We do not retain your number because we cannot: we do not see it, other than the normal last four digits for order confirmation purposes. The rest is hidden even from us.
Because the number is encrypted, we are unable to accept additions to your order, or any re-orders at a later date, without you providing all of your card details again. Our encryption certificate is shown on our order page, and no human being ever sees your number during transactions with easyDNA.