On *First Bank FirstMobile app*, you can request a chargeback/dispute for a transaction that went wrong — like duplicate debit, failed POS/ATM but money deducted, or fraud.
Here’s how to do it:
*Through FirstMobile App*
1. *Open FirstMobile App* and log in
2. *Tap “Transactions”* or “Transaction History” at the bottom
3. *Find the transaction* you want to dispute. Tap it to open details
4. *Tap “Dispute”* or *”Report Issue”* – usually at the bottom of the transaction details
5. *Select reason*: Choose from options like `Did not receive cash`, `Duplicate debit`, `Unauthorized transaction`, `Wrong amount`, etc.
6. *Add details*: Explain what happened. You can attach screenshots if the app allows
7. *Submit* and note the complaint/reference number. FirstBank will send updates via SMS/email
*If you don’t see “Dispute” option*
Some transactions need manual reporting:
1. *Call FirstBank*: 01-4485500 or 0700-909-9090
2. *Visit branch*: Go with your ID, account details, and any evidence like receipts/ATM slip
3. *Email*: firstcontact@firstbanknigeria.com with subject `Chargeback Request – [Your Account No]` + transaction details
*Important to know*
1. *Time limit*: Report ATM/POS failures within 24 hours. Fraud/unauthorized within 30 days. After 30-45 days it gets harder.
2. *Refund timeline*: If it’s a failed ATM/POS, FirstBank auto-reverses in 3-7 working days. If merchant didn’t claim the money, CBN rules say you must get it back in 24hrs. For fraud/chargeback, investigation can take 30-45 days.
3. *Evidence helps*: ATM receipt, POS slip, screenshot, location, time. For fraud, change your PIN/card immediately.
For “always dry” issue we discussed earlier — different problem 
But for bank disputes, act fast and keep the reference number.
What kind of transaction are you trying to dispute? ATM, transfer, POS, or online? I can give you the exact steps for that one.