How to Dispute a Transaction in Nigeria (2026)

A failed transfer that still debited you, an ATM that swallowed your cash request without dispensing, an unauthorised debit you never made — these are specific transaction problems with their own dispute process, distinct from a general service complaint. Speed and documentation matter enormously here. This guide explains how to dispute a transaction properly.

Act fast, and act through your bank's official channels — transaction disputes are time-sensitive, and the sooner you report it with clear evidence, the better your chances of a quick resolution. Keep every alert, receipt, and screenshot related to the transaction; this evidence is what your bank (and, if needed, the CBN) will rely on to investigate.

Common transaction disputes and how they differ

1. A failed transfer that still debited you

Money leaves your account, but the transfer never reaches the recipient (a system or network failure). These are often resolved faster than other disputes, since many failed-transfer reversals are handled through automated processes between banks — but you should still report it immediately if the reversal doesn't happen within a reasonable time.

2. An unauthorised or fraudulent transaction

A transaction you never made or authorised. This requires immediate reporting as suspected fraud — see also how to protect yourself from bank fraud for broader prevention. Speed matters enormously here, both to limit further unauthorised activity and to strengthen your case.

3. An ATM dispense failure

The ATM debits your account but doesn't dispense cash (or dispenses less than requested). Banks generally have a specific process for ATM dispense-error disputes, often involving reconciliation with the ATM network — report it immediately with the exact date, time, amount, and ATM location.

4. A duplicate charge

The same transaction is charged twice due to a system error. Report with both transaction references so your bank can identify and reverse the duplicate.

5. A merchant/POS dispute

You were charged the wrong amount, charged for something you didn't receive, or a POS transaction failed but still debited you. Report to your bank with the merchant details, date, and amount.

How to dispute a transaction: the general process

1. Act immediately — the sooner you report it, the better. Don't wait, even if you're unsure exactly what happened.
2. Report through your bank's official dispute channel — customer service, app, or branch — not an informal or unofficial route.
3. Provide full transaction details — reference number, date, time, amount, and (for ATM/POS issues) the specific location or merchant.
4. Request a reference number for your dispute and keep it.
5. Keep all evidence — transaction alerts, SMS/app notifications, receipts, and screenshots. This is what your bank uses to investigate.
6. Follow up if you don't hear back within a reasonable time, referencing your dispute reference.

What happens during the investigation

• Your bank may provisionally reverse the disputed amount while it investigates, depending on the nature of the dispute — though this isn't guaranteed for every type of transaction issue.
• Investigation timelines vary depending on the transaction type and whether other institutions (another bank, a card network, an ATM operator) are involved.
• Stay in contact and provide any additional information requested promptly, since delays on your end can slow the process too.

Keep evidence from the very start

• Screenshot or save every transaction alert the moment you notice an issue.
• Note the exact time, date, amount, and any reference numbers — precision matters for investigation.
• Keep records of every communication with your bank about the dispute, including who you spoke to and what was said.

This evidence protects you if the dispute takes time to resolve, or if you need to escalate further.

If your bank refuses to reverse a disputed transaction

If you believe a transaction was genuinely wrongful and your bank won't resolve it:

• Request a clear, written explanation of why the dispute was rejected.
• If you believe the rejection is unfair, escalate using the process in how to file a complaint against your bank, which covers the CBN escalation route for unresolved issues.

A quick scenario

Consider Amara, who withdraws cash at an ATM and watches it debit her account, but no cash comes out — a dispense failure. Rather than waiting to see if it resolves itself, she immediately screenshots the debit alert, notes the exact ATM location, time and amount, and reports it through her bank's app the same day. Her bank reconciles with the ATM network and reverses the transaction within a reasonable period. Contrast that with a colleague who experienced something similar but waited nearly two weeks to report it, having lost track of the exact time and unsure which ATM it was — his dispute took considerably longer to resolve, partly because the delay and incomplete details made it harder for the bank to investigate. Acting immediately, with precise details captured on the spot, made the real difference.

The bottom line

Disputing a specific transaction — a failed transfer, an unauthorised debit, an ATM that didn't dispense, a duplicate charge, or a merchant error — requires speed and clear documentation. Report it immediately through your bank's official dispute channel, provide full transaction details, and keep every piece of evidence (alerts, receipts, screenshots) from the moment you notice the issue. Different transaction types have different typical resolution paths, but acting fast and staying organised improves your outcome regardless of the specific issue. If your bank won't resolve a genuinely wrongful transaction, escalate using the broader bank-complaint process.

Frequently asked questions

How do I dispute a transaction with my bank in Nigeria? Report it immediately through your bank's official dispute channel (app, customer service, or branch), providing the transaction reference, date, time, and amount. Keep all evidence — alerts, receipts, screenshots — from the moment you notice the issue, and get a dispute reference number to track your case.

What should I do if an ATM debits my account but doesn't dispense cash? Report it to your bank immediately with the exact date, time, amount, and ATM location. Banks generally have a specific reconciliation process for ATM dispense errors, often involving coordination with the ATM network, so prompt, precise reporting helps speed up resolution.

How fast are disputed transactions usually resolved in Nigeria? It varies by transaction type — some failed-transfer reversals are handled relatively quickly through automated processes between banks, while disputes involving other institutions (another bank, a card network) can take longer. Reporting immediately with complete, accurate details generally leads to a faster resolution than a delayed or vague report.

What if my bank refuses to reverse a transaction I believe was wrongful? Request a clear, written explanation for the rejection. If you believe it's unfair, escalate using the broader bank-complaint process, which includes the option to bring the matter to the CBN's Consumer Protection function if the bank's own resolution isn't satisfactory. Keep all your documentation ready for this escalation.

Is disputing an unauthorised transaction different from a general dispute? Yes — an unauthorised or fraudulent transaction should be reported immediately as suspected fraud, since speed matters both for limiting further unauthorised activity and for strengthening your case. See broader fraud-protection guidance for the prevention side, alongside reporting the specific unauthorised transaction through your bank's dispute channel right away.

What evidence do I need to dispute a transaction successfully? Keep the transaction alert or notification (SMS, app, or email), note the exact date, time and amount, and for POS/ATM issues, the specific location or merchant name. Any receipts, screenshots, or prior communication related to the transaction strengthen your case. The more precise and complete your evidence, the easier it is for your bank to investigate and resolve the dispute quickly.

Can I dispute a transaction if I made a mistake, like sending money to the wrong account? This is different from an unauthorised or erroneous system transaction — if you genuinely authorised the transfer but sent it to the wrong recipient, report it to your bank immediately anyway, since some recovery processes exist for this scenario too, though success isn't guaranteed. Speed still matters enormously here; the sooner you report it, the better the chance of any recovery before funds are moved further.

What if my bank's app or customer service can't process my dispute immediately? Persist through the official channel and get a reference number even if immediate processing isn't possible — a documented dispute, even one that takes time to fully resolve, is far better than an informal report that leaves no trail. Follow up if you don't hear back within a reasonable time, and escalate through the broader complaint process if the dispute itself seems stalled without explanation.

Do I need to visit my bank branch to dispute a transaction? Often not — many banks allow you to report a transaction dispute through their app or customer service line, without requiring an in-person branch visit. That said, for complex or high-value disputes, visiting a branch in person can sometimes help ensure your case gets proper attention, especially if remote channels aren't resolving it satisfactorily.

What if my dispute involves a transaction with a different bank entirely? Report it to your own bank first, since they're your primary point of contact and will coordinate with the other institution as needed during the investigation. Cross-bank disputes can sometimes take longer to resolve than issues confined to a single bank, given the need for coordination, so patience and consistent follow-up matter even more in this scenario.

Educational information, not legal advice. Dispute processes and timelines vary by bank and transaction type — report issues immediately through your bank's official channels and keep full documentation.