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.

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.

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.