Noticed an unexpected deduction from your bank account? Whether it is an unfamiliar digital transaction, an incorrect service fee or a charge that appears higher than what your bank normally levies, ignoring it could make the situation more difficult to resolve.

Many customers immediately call their bank's customer-care number after spotting an unexplained debit. While contacting the bank quickly is important, a phone call alone may not be enough. Customers should formally register the complaint, preserve transaction records and follow the escalation process if the issue remains unresolved.

The Reserve Bank of India (RBI) has laid down rules for handling certain unauthorised electronic banking transactions. Customers can also escalate eligible unresolved complaints through the RBI's grievance redressal mechanism after first approaching their bank.

If money has been unexpectedly or incorrectly deducted from your account, here are six important steps to consider.

1. Report an Unauthorised Transaction Without Delay

Speed is extremely important when dealing with a transaction you did not authorise.

If you discover a debit that you do not recognise, contact your bank immediately using an official communication channel. Do not wait for the next monthly statement or assume that a small transaction is harmless.

Under RBI rules governing unauthorised electronic transactions, a customer's liability can be zero in certain situations when the unauthorised transaction is reported within three working days of receiving the bank's communication about it.

Waiting longer to report the transaction can affect how liability is determined. Customers should therefore report suspicious activity as soon as they become aware of it.

2. Don't Rely Only on a Phone Call—File a Formal Complaint

Calling customer care can be the first step, but it is advisable to create a written record of the dispute.

Customers can use the bank's official mobile application, internet banking portal, designated email channel or branch complaint mechanism to submit their grievance.

Clearly mention relevant information such as the transaction date, disputed amount and why you believe the debit is unauthorised or incorrect.

After submitting the complaint, save the complaint or reference number. Also preserve emails, screenshots, bank messages and other correspondence related to the dispute.

Where the applicable RBI framework requires it, the bank is expected to provide a shadow reversal or provisional credit of the disputed amount within 10 working days from the customer's notification.

Maintaining a complete record can prove particularly useful if the matter later needs to be escalated.

3. Incorrect Bank Fee? Ask for the Calculation

Not every unexplained deduction is necessarily a fraudulent transaction.

Sometimes customers may be charged a fee that they believe is incorrect or higher than the amount mentioned in the bank's applicable schedule of charges.

In such a case, ask the bank to explain exactly why the fee was imposed.

Request the applicable terms and conditions, fee schedule and calculation used to determine the amount deducted from your account.

For example, if you believe the bank charged more than its stated fee for a particular service, compare the deduction against the relevant schedule applicable to your account.

Keep copies of your bank statement, applicable fee information and correspondence with the bank. Documentation can make it much easier to demonstrate why you believe the deduction should be reversed.

4. Give the Bank an Opportunity to Resolve Your Complaint

Customers generally cannot skip the bank's internal complaint mechanism and immediately approach the RBI Ombudsman.

The complaint should first be raised with the regulated entity concerned.

According to the source article, the Reserve Bank–Integrated Ombudsman Scheme, 2026, effective from July 1, 2026, provides a free grievance redressal mechanism for eligible complaints involving deficiencies in services provided by regulated financial entities.

If the bank does not respond within 30 days after receiving the complaint, or if the customer receives a response but is not satisfied with the resolution, the matter may then be eligible for escalation under the RBI's complaint mechanism, subject to the applicable conditions.

This is another reason why maintaining the original complaint number and date is important.

5. Escalate an Unresolved Complaint Through RBI's CMS

If the bank fails to resolve the issue satisfactorily after you have followed its complaint process, you may be able to escalate the grievance through the RBI's Complaint Management System (CMS).

The complaint mechanism is free for eligible grievances.

Customers can use CMS to submit complaints relating to covered regulated entities, provided the case satisfies the applicable eligibility and procedural requirements.

The source article also mentions RBI's 14448 contact number, which consumers can use to obtain information about the complaint process and status.

Before escalating the matter, keep your documents ready. These may include the bank complaint reference, transaction details, screenshots, statements, email exchanges and the response received from the bank, if any.

6. Continue Monitoring Your Account Until the Case Is Closed

Filing a complaint should not be the final step.

Continue checking the account until you confirm that the disputed amount has actually been credited back and the complaint has been officially resolved.

If the bank has provided a provisional credit while investigating the transaction, retain all supporting documents until you receive confirmation that the case has been closed.

Customers should also check whether any additional unfamiliar deductions appear after the original incident.

Activating transaction alerts can help identify suspicious activity quickly. Regularly reviewing bank and card statements is another simple habit that can prevent small unexplained deductions from going unnoticed for months.

Why Keeping Evidence Matters

A well-documented complaint is easier to track and escalate than a dispute based only on verbal conversations.

Whenever you report an incorrect debit, preserve the transaction reference, amount, date, bank complaint number, screenshots, emails and any written response received from the bank.

For disputes involving service fees rather than fraud, keep the bank's applicable fee schedule or terms and conditions as well.

The objective is to establish a clear timeline showing when the deduction occurred, when you discovered it, when the bank was informed and what action the bank subsequently took.

Act Quickly When You Spot an Unfamiliar Debit

An unexpected deduction does not always mean fraud. It could result from a legitimate service charge, a processing issue or another banking-related reason. However, customers should not assume that every debit appearing in their account is automatically correct.

Check the transaction details first. If you still believe the deduction is unauthorised or incorrectly calculated, report it promptly through the bank's official channels and create a written record.

If the bank does not provide a satisfactory resolution within the applicable grievance period, eligible customers can consider escalating the complaint through the RBI mechanism.

Most importantly, don't ignore an unfamiliar transaction simply because the amount is small. Prompt reporting, proper documentation and timely escalation can significantly improve your ability to dispute an incorrect bank debit and seek an appropriate resolution.

Disclaimer: This article is for general informational purposes only. Banking and RBI grievance rules may depend on the nature of the transaction, reporting timeline and individual circumstances. Customers should check the latest official RBI and bank guidelines before taking action.