To block your ATM card immediately, especially if it is lost or stolen, contact your issuing bank through one of the following secure methods:
- Call the bank's 24/7 customer care number to report the loss and request an immediate block.
- Use the bank's official NetBanking portal or mobile banking application to hotlist/block the card in the 'Card Services' or 'Card Management' section.
- Send a pre-formatted SMS (such as BLOCK followed by the last 4 digits of your card) to the bank's designated number from your registered mobile number.
- Visit the nearest bank branch and submit a card blocking request application.
Blocking your card promptly is essential to prevent unauthorized transactions.