All online card transactions, as per RBI’s mandate, need to have a second level authentication when a transaction is made. Hence the cards need to be registered for Verified by Visa(VBV)or MasterCard Secure Code to complete an online transaction. A transaction can be carried out only on those websites that are Verified by Visa or MasterCard Secure Code enabled. Thus when you are making an online transaction on these websites you will be prompted to register for the service, if you have not registered till date. You can fill the required details and complete the transaction after registering. You can also register your card for Verified by Visa or MasterCard Secure Code here. View more