"CVC" stands for Card Validation Code.
The CVC is a unique three-digit number that is linked to your credit card number. It can be found on the back of your credit card as shown here:
When placing and ticket order you are requested to intriduce the CVC as well as other data for you card (Credit Card Number, Cardholder's Name and Expiration Date).
Notice! Please make sure that the introduced numbers are correct. Otherwise your payment won't be successful and you will have to place a new order for the ticket(s) and ticket availability will not be guaranteed.