The Manager,
__________ (Bank Name),
__________ (Branch Address)

Date: __/__/____ (Date)

Subject: Complaint Regarding Unexplained Deduction

Respected Sir/Madam,

My name is _________ (Name) and I do hold a ___________ (Type of bank account – savings/ current/other) in your branch bearing account number _________ (account number).

I am writing to address a concern related to an unexplained deduction from my account with your bank. I have noticed a deduction of _______ (amount deducted) from my bank account as a processing charge, and I request clarification on this matter.

Please find attached the relevant statements for your review. I shall be obliged.

Thank you for your cooperation.

_________ (Your Signature)
_________ (Your Name)
_________ (Contact number)