Ask for expiration date before CVV code when entering manually. Avoid going back and forth with credit card. When you put in information manually, you normally have the card number and expiration date on the front side, once that is entered you turn the card and put in the CVV code. I very often take the info over the phone and the customer is frustrated because he gives the expiry date first but we ask for the CVV, then we ask him for the date which he already gave and must give again.