How to protect your BVN and NIN from fraudsters

The short answer: treat your BVN and NIN like the keys to your house. Share them only when you started the process with an official bank, government office or verified service, never because someone called, texted or messaged you first.

Why these numbers matter

Your BVN (Bank Verification Number) links all your bank accounts to you. Your NIN (National Identification Number) is your national identity number, linked to your SIM cards and many official services.

On their own, these numbers aren’t passwords. But fraudsters combine them with other details, like your date of birth, phone number or an OTP, to pretend to be you, reset accounts or take loans in your name.

Who should never ask for your details

• Callers claiming to be from your bank who say your account will be “blocked” unless you confirm your BVN.
• Messages on WhatsApp, SMS or social media asking you to “update” or “verify” your BVN or NIN through a link.
• Online loan, job or giveaway offers that need your BVN before telling you anything.

Rule: your bank will never ask for your PIN, password or OTP by phone, SMS, email or WhatsApp. Anyone who does is a fraudster.

The tricks fraudsters use

1. The “account restriction” call: they create panic so you act without thinking.
2. Fake verification links: a website that looks like a bank or government portal and collects your details.
3. The OTP request: after getting your BVN, they ask you to “read back the code we just sent”. That code authorises a transaction or account change.
4. Fake job or loan forms that collect your BVN, NIN, date of birth and photo all at once.

Simple habits that keep you safe

• Never share an OTP or PIN with anyone, for any reason.
• Start the conversation yourself. If “your bank” calls, hang up and call the number on the back of your card or on the bank’s official website.
• Type website addresses yourself instead of clicking links in messages.
• Turn on transaction alerts so you see every movement on your account.
• Don’t post photos of your ID card, NIN slip or bank card online.
• Check new loan or account messages. If you get a message about a loan or account you didn’t open, contact the bank straight away.

If you think your details have been used

1. Call your bank immediately and ask them to secure your account.
2. Change your banking passwords and PINs.
3. Report to the police and keep a record of what happened.
4. Watch your accounts closely for the next few weeks.

Where to go next

Got a question about your bank account or ID? Ask Mr. Tom on WhatsApp. Your question could become our next Deep Dive.

This post is general information, not legal or financial advice.