[ Consumer format ]

Complaint Letter to Bank Format for Wrong Debits, Charges and Poor Service

Reserve Bank – Integrated Ombudsman Scheme, 2026 (prior written complaint to the regulated entity); RBI directions on customer protection and customer service

Free sample · Word, print and copy · Updated 12 November 2026

Sample format, not legal advice. This is a sample format for general information. It is not legal advice and does not create a lawyer–client relationship. Facts, court practice, court fees and stamp duty differ by state and by case. Check the current law and your local court rules, or speak to an advocate, before you file, send or sign it.

A complaint letter to the bank is a written grievance addressed to your branch or the bank's grievance cell about an unauthorised or wrong debit, unexplained charges, a failed transaction that was not reversed, delay in returning loan documents, or any other lapse in service. It is the compulsory first step before you can go to the RBI Ombudsman: under the Reserve Bank – Integrated Ombudsman Scheme, 2026, the Ombudsman will not take up a complaint that was not first made in writing to the bank.

Send it to the branch manager and mark a copy to the bank's Principal Nodal Officer or grievance redressal officer, whose contact details every bank publishes on its website. If the bank rejects the complaint, gives an unsatisfactory reply, or does not reply within 30 days, you can file an RBI Ombudsman complaint within the next 90 days.

Sent to: Branch manager, with a copy to the bank's Principal Nodal Officer or grievance cell
Sent by: The account holder or customer
Mode: Branch letter with acknowledgement, bank's online grievance portal, or email
Wait before escalating: 30 days, unless the bank replies earlier
Next step: RBI Ombudsman within 90 days after the 30-day period or the bank's last reply
Fraud cases: Report to the bank immediately and to cyber helpline 1930; delay can increase your liability

When to use this format

Money has been debited from your account, card or UPI without your authorisation.
An ATM, UPI or card transaction failed but the amount was not credited back.
The bank has levied charges, penalties or interest you believe are wrong or were not disclosed.
The bank has delayed returning title documents after you repaid a loan, or has reported you wrongly to a credit bureau.
For a detailed complaint about an unauthorised electronic transaction, you can also use the unauthorised transaction complaint format.

Complaint letter to a bank

Open PDF

Replace everything in [square brackets] with your own details. Delete lines that do not apply.

Date: [DATE]

To,
The Branch Manager
[NAME OF BANK]
[BRANCH NAME AND FULL ADDRESS]
[Email: [BRANCH OR GRIEVANCE EMAIL]]

Copy to:
The Principal Nodal Officer / Grievance Redressal Officer
[NAME OF BANK], [ADDRESS OR EMAIL AS SHOWN ON THE BANK'S WEBSITE]

Subject: Complaint regarding [SHORT DESCRIPTION, e.g. unauthorised debit of Rs. [AMOUNT] on [DATE] / wrongful charges / failed ATM or UPI transaction not reversed / delay in return of loan documents] — Account No. [LAST 4 DIGITS]

Sir / Madam,

1. I, [FULL NAME], residing at [FULL ADDRESS WITH PIN], hold a [SAVINGS / CURRENT / LOAN / CREDIT CARD] account No. [LAST 4 DIGITS] with your [BRANCH / BANK] since [YEAR]. My registered mobile number is [MOBILE NUMBER] and email is [EMAIL].

2. [DESCRIBE THE GRIEVANCE IN DATE ORDER WITH REFERENCES, e.g. On [DATE] at [TIME], Rs. [AMOUNT] was debited from my account through [UPI / CARD / NET BANKING / ATM], transaction reference [UTR / RRN NUMBER]. I did not make or authorise this transaction. / On [DATE], I attempted an ATM withdrawal of Rs. [AMOUNT] at [ATM ID AND LOCATION]; the amount was debited but no cash was dispensed. / On [DATE], a charge of Rs. [AMOUNT] described as [NARRATION] was debited without prior notice.]

3. [FOR AN UNAUTHORISED TRANSACTION: I reported this transaction to the bank on [DATE] at [TIME] through [CUSTOMER CARE CALL / SMS / APP / EMAIL / BRANCH], reference No. [NUMBER], and blocked my [CARD / NET BANKING / UPI]. I have also reported it on the National Cyber Crime Reporting Portal / helpline 1930, acknowledgement No. [NUMBER]. I have not shared my PIN, OTP, password or card details with anyone.]

4. Because of this, I have suffered a loss of Rs. [AMOUNT], and [STATE ANY CONSEQUENCE, e.g. my EMI of Rs. [AMOUNT] bounced on [DATE] / a cheque issued by me was returned / penal charges were levied].

5. I request you to:
(a) [CREDIT BACK / REVERSE / REFUND] Rs. [AMOUNT] to my account [WITH APPLICABLE COMPENSATION AS PER RBI INSTRUCTIONS];
(b) give me a written explanation of [THE DEBIT / THE CHARGE / THE DELAY];
(c) [REVERSE THE PENAL CHARGES / CORRECT MY CREDIT INFORMATION / RETURN MY ORIGINAL TITLE DOCUMENTS]; and
(d) not take any adverse action against my account, such as marking it overdue or reporting a default, while this complaint is being examined.

6. Please acknowledge this complaint and give me a complaint reference number. If I do not receive a satisfactory reply within 30 days of your receiving this letter, or if my complaint is rejected, I shall approach the RBI Ombudsman under the Reserve Bank – Integrated Ombudsman Scheme, 2026, without further notice.

Enclosures:
1. Copy of account statement / passbook showing the disputed entry
2. Copies of SMS or email alerts and screenshots
3. [Copy of cyber crime complaint acknowledgement, if any]
4. [Other relevant documents]

Yours faithfully,

[SIGNATURE]
[NAME]
[CUSTOMER ID, IF KNOWN]
Mobile: [MOBILE NUMBER]
Email: [EMAIL]

How to fill it in

Report fraud first, write laterFor an unauthorised transaction, inform the bank at once through its 24x7 channel (phone, SMS, app or email) and block the card or channel. Then send this letter as written confirmation. The time of first reporting decides how much of the loss the bank must bear.
Give exact transaction detailsQuote the date, time, amount and reference number (UTR, RRN, ATM ID or card transaction ID). Give only the last four digits of your account and card numbers.
Say clearly what you wantAsk for a specific remedy — reversal, refund, waiver, correction of a credit report or return of documents — and a written explanation.
Get proof of submissionAsk for a stamped acknowledgement at the branch, or keep the online complaint number or email. The Ombudsman will ask for proof that you complained to the bank and when.
Mark a copy to the nodal officerFind the Principal Nodal Officer's details on the bank's website (usually under 'Grievance Redressal'). Escalating early often speeds up the reply.
Diary the deadlinesNote the date the bank received your complaint. After 30 days without a reply, or on an unsatisfactory reply, you can approach the RBI Ombudsman, and must do so within 90 days.

Documents to attach

Account statement or passbook entry showing the disputed transaction
SMS or email alerts and screenshots
Transaction slip, ATM receipt or payment confirmation
Acknowledgement of the cyber crime complaint (for fraud)
Loan closure letter or no-dues certificate (for document or credit report issues)
Copies of any earlier complaints and replies

Unauthorised electronic transactions: why speed matters

RBI's rules on limiting customer liability in unauthorised electronic banking transactions place the loss on the bank where the fraud is due to the bank's own negligence, and give the customer zero liability for third-party breaches reported quickly. Under the framework in force in 2026, zero liability applies where a third-party breach is reported within three working days of receiving the bank's communication about the transaction; reporting after four to seven working days caps your liability at a limited amount, and later reporting is governed by the bank's board-approved policy.

RBI issued amendment directions on 24 June 2026 that take effect on 1 January 2027. They set the zero-liability window for third-party breaches at five calendar days from the date of the fraud, and cap the time a bank may take to resolve a complaint at 45 calendar days (60 for cross-border transactions), against 90 days under the present rules. Whatever the rule, report the transaction to the bank and to helpline 1930 immediately.

Common mistakes

Complaining only by phone without a written complaint, which leaves no proof for the Ombudsman.
Waiting days before reporting an unauthorised transaction.
Sharing full account or card numbers, PIN or OTP in the letter or email.
Not keeping the acknowledgement or complaint reference number.
Going to the Ombudsman before 30 days have passed when the bank has not replied.

Frequently asked questions

Is it necessary to complain to the bank before going to the RBI Ombudsman?

Yes. Under the Reserve Bank – Integrated Ombudsman Scheme, 2026, a complaint is not maintainable unless you first complained in writing to the bank and either received an unsatisfactory reply or got no reply within 30 days.

How long does the bank have to reply?

For the Ombudsman route, the key period is 30 days from the bank's receipt of your complaint, or a longer period if RBI, NPCI or card network rules fix one for that type of transaction. Banks have their own grievance timelines, which are published in their grievance redressal policy.

Will the bank refund money lost in an online fraud?

It depends on whose fault it was and how quickly you reported it. If the bank was negligent, or a third party committed the fraud and you reported it within the time RBI allows, you are entitled to zero liability. If you shared your OTP or PIN, the loss may fall on you until you report it.

Who is the Principal Nodal Officer?

Every bank appoints a senior officer to handle customer grievances and coordinate with the RBI. The name and contact details are published on the bank's website under grievance redressal.

Can I also file a consumer complaint against the bank?

Yes. Banking is a service under the Consumer Protection Act, 2019. You may choose the Consumer Commission instead of the Ombudsman, but you should not pursue the same grievance in both forums at the same time.

Reminder: This is a sample format for general information. It is not legal advice and does not create a lawyer–client relationship. Facts, court practice, court fees and stamp duty differ by state and by case. Check the current law and your local court rules, or speak to an advocate, before you file, send or sign it. Spotted an error? Tell us.