SMS: Debit and credit cards can also be blocked via SMS. All that needs to be done is send an SMS to the number the bank provides, following a specific format.

You can block your debit or credit card through your bank’s online banking portal or mobile app. Most banks provide a straightforward process for card management, including blocking a card.

Each bank may have a different format for the SMS, but generally speaking, it entails sending a keyword, such as “BLOCK,” followed by the final four digits of your card number.