WORKING Codes to Block Bank Accounts in Nigeria

Blocking your bank account is crucial in situations like losing your phone or suspecting unauthorized access. Many banks in Nigeria now offer USSD codes that allow customers to block or restrict their accounts quickly to prevent fraud.

Here are the USSD codes for some major Nigerian banks to block your account:


1. Access Bank

  • USSD Code: Dial *901911# from any phone.
  • Follow the prompts to block your Access Bank account.

2. GTBank (Guaranty Trust Bank)

  • USSD Code: Dial *73751*74# from any phone.
  • Enter the mobile number linked to your account and follow the prompts to block your account.

3. First Bank

  • USSD Code: Dial *894911# from any phone.
  • Follow the on-screen instructions to block your First Bank account.

4. Zenith Bank

  • USSD Code: Dial *966911# from any phone.
  • Follow the prompts to block your Zenith Bank account.

5. UBA (United Bank for Africa)

  • USSD Code: Dial *919911# from any phone.
  • Follow the instructions to block your UBA account.

6. Fidelity Bank

  • USSD Code: Dial *770911# from any phone.
  • Follow the prompts to block your Fidelity Bank account.

7. Union Bank

  • USSD Code: Dial *8266# from any phone.
  • Follow the prompts to block your Union Bank account.

8. Polaris Bank

  • USSD Code: Dial *83313# from any phone.
  • Follow the instructions to block your Polaris Bank account.

9. FCMB (First City Monument Bank)

  • USSD Code: Dial *329911# from any phone.
  • Follow the prompts to block your FCMB account.

10. Stanbic IBTC

  • USSD Code: Dial *909911# from any phone.
  • Follow the on-screen instructions to block your Stanbic IBTC account.

General Emergency Method: Contact Your Bank’s Customer Service

If you’re unable to access USSD services, you can contact your bank’s customer service hotline to block your account immediately. Most banks also have customer service emails or online chat systems available on their websites.


Blocking your account through these methods is a quick and efficient way to prevent unauthorized access to your funds. Make sure to follow up with your bank afterward for proper reactivation or additional security measures once the issue is resolved.

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