debit card credit card rule: Can't use debit card or credit card for online transactions if you don't do this
Got a new debit or credit card? Make sure to activate its card control mechanism first either using the banks mobile/net-banking application or at branch. Without activating the card controls, the debit or credit card will not work either offline or online.
Sajish Pillai Kotak Mahindra Consumer Banking Group Axis Bank Kotak Mahindra Bank Domestic International
Source: indiatimes.com