Are you in loss of your Debit cum ATM card or missed it anywhere? Confused what to do next? You should request your bank to block it immediately to prevent the misuse of your ATM card by someone else and apply for new debit card. You should inform your bank officials to take an immediate action. Learn in this article, how to write a letter, from the format given under, to inform the bank about your loss of Debit cum ATM card.