How to Dispute an Unauthorized Transaction with Your Bank

Spotting a transaction you never made on your bank statement is genuinely unsettling — and how quickly and correctly you act in the first few hours matters enormously. Nepal's banking system gives you a real, structured path to dispute unauthorized activity, first through your bank directly, and then through Nepal Rastra Bank's own grievance system if you don't get a fair resolution. This guide walks through exactly how to dispute an unauthorized bank transaction in Nepal, step by step, along with your rights and what to realistically expect at each stage.

Signs of Unauthorized/Fraudulent Activity

Recognizing unauthorized activity early makes a real difference in how much you can limit the damage. Watch for:

• Transactions you don't recognize in your account statement, mobile banking transaction history, or SMS/email alerts — even small amounts, since fraudsters sometimes test with tiny transactions before larger ones.
• Unexpected OTP or verification code messages you didn't request, which can indicate someone is actively attempting to access your account or complete a transaction using your details.
• A sudden drop in your account balance that doesn't match your own spending or transfers.
• Login alerts or password change notifications for your mobile or internet banking that you didn't initiate.
• Your card being declined unexpectedly, which can sometimes indicate a bank's own fraud detection system already flagged suspicious activity and froze the card automatically.
• Missing physical card or a card that shows signs of tampering at an ATM or point-of-sale terminal (a common sign of card skimming).

Immediate Steps to Take

1. Freeze or block your card immediately — most mobile banking apps have a "Block Card" or "Freeze Card" option directly in the app; alternatively, call your bank's 24-hour customer service or fraud hotline.
2. Change your mobile and internet banking passwords/PINs right away, particularly if you suspect your login credentials, not just your card, may have been compromised.
3. Call your bank's dedicated fraud or customer service line as your very next step — most Nepali banks maintain 24-hour hotlines specifically for this kind of urgent reporting.
4. Take screenshots of the unauthorized transaction(s), any suspicious SMS/email alerts, and your current account balance before doing anything else that might change what's visible in your transaction history.
5. Do not respond to any follow-up calls or messages claiming to be your bank asking for your PIN, OTP, or password — this is a common secondary phishing attempt following a fraud incident, and no legitimate bank representative will ever ask for these details.

Step-by-Step Formal Dispute Filing Process

1. Visit your branch or use your bank's official complaint channel as soon as possible after your initial phone report, since a phone call alone typically needs to be followed by a formal, written or logged complaint.
2. Request to speak with or submit your complaint to the bank's designated grievance-hearing officer — every bank and financial institution licensed by Nepal Rastra Bank is required to have one, as part of the country's financial consumer protection framework.
3. Clearly describe the unauthorized transaction(s) — date, time, amount, and any transaction reference number visible in your statement or app.
4. Submit your written complaint along with supporting evidence (covered in the next section), and request a formal acknowledgment or complaint reference number.
5. Ask the bank to temporarily freeze or restrict further transactions on the account while the investigation is ongoing, if this hasn't already happened automatically.
6. Keep a copy of everything you submit — your written complaint, any reference number given, and the date and name of the staff member who received it.
7. Follow up periodically if you don't hear back within a reasonable timeframe, rather than assuming silence means it's being handled.

Complaining to your bank first isn't optional — it's a required first step before Nepal Rastra Bank will take up your case directly. Make sure your complaint to the bank is properly logged and acknowledged, since you'll need to show you gave the bank a fair opportunity to resolve the issue before escalating further.

Documents Needed to Support Your Claim

Gather these before or during your formal complaint to strengthen your case:

• Your citizenship certificate or National ID for identity verification.
• Bank account or card statement clearly showing the disputed transaction(s).
• Screenshots of any SMS or email alerts related to the transaction, login attempts, or OTP requests around the time of the incident.
• A written, signed statement describing what happened, when you noticed it, and confirming you did not authorize the transaction(s).
• Your card (if physically present) or details of the card involved, in case the bank needs to inspect it for signs of tampering or cloning.
• Any communication with a scammer, if the unauthorized transaction resulted from a phishing call, message, or fake website, since this context can help the bank's investigation and may be relevant if you also file a police or cybercrime report.

Resolution Timelines and What NRB Guidelines Say

Nepal Rastra Bank's financial consumer protection framework, rooted in the Banks and Financial Institutions Act (BAFIA), requires banks and financial institutions to provide services in a fair, credible, and transparent manner — and to properly hear and address customer grievances rather than ignoring or indefinitely delaying them. In practice, this means:

• Every licensed bank must have a designated grievance-hearing officer whose role is specifically to receive and address customer complaints, including disputes over unauthorized transactions.
• Banks are expected to investigate and respond within a reasonable timeframe, though the exact number of days can vary by bank and by the complexity of the specific case — ask your bank directly what their internal service-level timeline is when you file your complaint, so you have a concrete benchmark to hold them to.
• If you're not satisfied with your bank's response, or receive no resolution at all, you have the right to escalate your complaint directly to Nepal Rastra Bank's Financial Consumer Protection framework.

Escalating to NRB If Unresolved

If your bank fails to resolve your complaint fairly, or doesn't respond at all within a reasonable period, Nepal Rastra Bank provides a direct escalation path through its Grievance Management System (GMS):

1. Visit the official NRB Grievance portal at gunaso.nrb.org.np.
2. Register your complaint with full details of the unauthorized transaction, your original complaint to the bank, and the outcome (or lack of one) you received.
3. Upload supporting documents — your bank statement, written complaint copy, and any reference number from your original bank complaint.
4. Receive a registration/tracking number via email, which lets you follow the status of your complaint through the portal.
5. Alternative channels: If you prefer not to use the online portal, you can also file a complaint by visiting Nepal Rastra Bank's Financial Consumer Protection Unit in person, by phone, or by email through their published contact channels.
6. NRB reviews and, where warranted, investigates the matter, engaging with the bank directly as part of its regulatory oversight role.

This system exists specifically because BAFIA law places a responsibility on NRB to ensure banks treat customers fairly — you are not simply asking for a favor by escalating; you're exercising an established regulatory right as a financial consumer in Nepal.

FAQs

What should I do first if I notice an unauthorized transaction on my account?

Freeze or block your card immediately through your mobile banking app or your bank's fraud hotline, then follow up with a formal written complaint to your bank as soon as possible.

Do I have to complain to my bank before going to Nepal Rastra Bank?

Yes — filing a complaint with your bank first is a required step. NRB's grievance system is designed as an escalation path for cases where the bank hasn't resolved the issue fairly, not as a first point of contact.

Is there a guaranteed timeframe within which my bank must resolve my dispute?

There isn't one universal, publicly fixed number of days that applies to every case — ask your specific bank for their expected resolution timeframe when you file your complaint, and use that as your reference point for following up or escalating.

Should I also report unauthorized transactions to the police?

For cases involving clear fraud, phishing, or cybercrime, filing a report with Nepal Police's Cyber Bureau alongside your bank complaint can support both the investigation and any potential recovery efforts, particularly for larger amounts.

Key Takeaways

Discovering an unauthorized transaction is stressful, but Nepal's banking system does give you a genuine, structured path to challenge it — starting with your bank's own grievance process and backed by Nepal Rastra Bank's regulatory oversight if that first step falls short. Acting quickly, documenting everything carefully, and knowing that escalation to NRB is a real, exercisable right rather than a last-ditch hope puts you in a meaningfully stronger position to get your case taken seriously and, hopefully, resolved in your favor.