To, The Branch Manager, [Bank Name], [Branch Name], [City]
Date: [Date]
Subject: Request for [new ATM card / new cheque book / updating my mobile number]
Respected Sir/Madam,
I hold a [savings/current] account at your branch, Account No. [account number], in the name of [Your Name]. I request you to kindly [state the need, e.g. issue a new ATM card as my old card has been damaged / issue a new cheque book of 25 leaves / update my registered mobile number to [new number]].
[If replacing a card: I have blocked the old card through customer care.] I have attached a copy of my ID proof for verification, and I am willing to complete any further formalities required.
Kindly process my request at the earliest.
Thanking you,
Yours faithfully, [Your Name] Account No. [account number] [Registered Mobile Number]