Details of your MasterCard as well as every other ATM card with online/internet banking feature needs to be kept secret. This is because the details of the card could be used to make online debit transactions without any form of authorization request sent to the owner of the card.
If you own a Gtbank MasterCard, you can quickly block a lost MasterCard via a single SMS to avoid stories that touch. All it require is your GTBank account number and you are all set to block the lost or stolen GTBank MasterCard.
How to Block Lost/Stolen Gtbank MasterCard
NB: No space in-between the command and the account number. If you are UBA customer, you can also Block lost UBA ATM Card through your phone
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