We suggest you to do one of the following:
Option 1: Lock the card temporarily and unlock it once you find the card.
Option 2: Block the card permanently. However, the card can be replaced by requesting for a new one

You can alert us by tapping on 'Message Us' button on the app, we will send a replacement card to your present or permanent address. The additional card will cost you ₹236 (including GST).