The Wrong Transaction Complaint Letter is an essential document in the Nigerian banking sector's consumer protection framework. It is typically used when a customer identifies an incorrect, unauthorized, or erroneous transaction in their account and needs to formally request its rectification. The letter should be drafted in accordance with the Central Bank of Nigeria's Consumer Protection Framework and the Banks and Other Financial Institutions Act (BOFIA) 2020. It serves as the first formal step in the dispute resolution process, documenting the error, its details, and the requested remedy. The document should include specific transaction details, account information, and any supporting evidence, making it an important record for both the customer and the bank. This letter can be used by both individual and corporate customers and may form part of the evidence if the complaint needs to be escalated to regulatory authorities.

1. Sender's Details: Full name, address, contact information, and account details of the complainant

2. Date: Current date of writing the complaint letter

3. Recipient's Details: Bank's name, branch address, and department (usually Customer Service or Complaints Unit)

4. Subject Line: Clear indication that this is a complaint about a wrong transaction

5. Transaction Details: Specific details of the incorrect transaction including date, amount, reference number, and account information

6. Description of Error: Clear explanation of what went wrong with the transaction

7. Previous Communication: Reference to any previous attempts to resolve the issue

8. Request for Resolution: Specific action requested from the bank (e.g., reversal, correction)

9. Closing: Professional closing with signature and contact information