Mobile financial services make everyday payments fast, but fraudsters exploit urgency, fear and attractive offers. The most effective protection is simple: never share a PIN, OTP, Secret Code or Security Code, and never follow transaction instructions from an incoming caller.

This Bangladesh-focused guide uses advice from official bKash and Bangladesh Bank resources checked on 19 August 2026. It applies broadly to mobile wallets, mobile banking and agent-assisted transactions.

The common scam patterns

“Your account must be updated” calls

A caller claims to be from customer service and says your account will be blocked unless you confirm information. They may know your name or recent activity, but that does not prove they are genuine. Hang up and contact the provider through the number inside its official app or website.

Prize, allowance or subsidy messages

Official bKash fraud guidance warns about messages promising pensions, scholarships, government donations or electricity subsidies. The scammer then asks the victim to call a number or follow instructions. Real benefits do not require you to reveal a wallet PIN or approve an unknown transaction.

Fake online shops and advance payments

A social-media seller may demand full advance payment or a “delivery charge” to a personal wallet, then disappear or send a different product. Check the seller’s business identity, return terms, independent reviews and a verifiable address. For an unfamiliar seller, cash on delivery or a protected merchant checkout is safer.

Wrong-number and refund tricks

Someone says money was sent to you by mistake and pressures you to return it immediately. Do not rely on an SMS screenshot. Check your actual transaction history and contact official support. A fabricated message can look convincing.

Screen-sharing and remote-access apps

A fraudster may ask you to install an app so they can “help.” Remote-access software can expose your screen, OTP messages and wallet activity. Do not install software or enable accessibility permissions at a caller’s request.

Seven rules that prevent most losses

  1. Keep every PIN and one-time code private. bKash states that its authorities will not ask for your PIN, Secret Code or Security Code.
  2. End the incoming call. Call back using the official app, website or verified helpline.
  3. Read the confirmation screen. Check recipient name, number and amount before entering your PIN.
  4. Ignore countdown pressure. “Act in two minutes” is a social-engineering technique.
  5. Lock your phone. Use a strong device PIN or biometric lock and hide sensitive notification previews.
  6. Use official apps. Install from the Google Play Store or Apple App Store and verify the developer.
  7. Keep evidence. Save the transaction ID, time, number, screenshots and conversation details.

What to do immediately if you suspect fraud

  1. Stop communicating with the suspected fraudster.
  2. Open the official wallet app from your own phone and change the wallet PIN if you may have exposed it.
  3. Contact the provider immediately. bKash lists 16247 as its helpline on its security pages.
  4. Give support the transaction ID, amount, date, time and recipient number. Speed matters, although recovery is never guaranteed.
  5. If a bank card or bank account is involved, call that bank using the number on its official site or the back of the card.
  6. For unresolved regulated-financial-service complaints, Bangladesh Bank’s Customers’ Interest Protection Center lists 16236 and bb.cipc@bb.org.bd.
  7. Report serious fraud to the appropriate law-enforcement or cybercrime channel and preserve all evidence.

Security checklist for families and small businesses

  • Teach family members that a support employee never needs their PIN.
  • Set transaction limits appropriate to normal use.
  • Do not use the same PIN for the phone lock and wallet.
  • Review wallet history regularly.
  • For business payments, publish one verified merchant number on your official website.
  • Protect the website and domain that customers use to verify you. Read SiteChai’s guide to SSL certificates and consider managed WordPress hosting for a professional online presence.

Useful official contacts

Frequently asked questions

Will bKash ask for my PIN or OTP?

Official bKash security guidance says authorities will not ask for a PIN, Secret Code or Security Code. Treat any such request as fraudulent.

Can a scammer take money by calling me?

A normal call alone cannot authorise a wallet transaction. The danger is being manipulated into revealing a code, installing remote-access software or approving a payment yourself.

What if someone genuinely sent money to me by mistake?

Verify the credit inside the official app and contact official support before returning anything. Do not act on a screenshot, forwarded SMS or caller pressure.

Bottom line

Pause, verify and use only official channels. A legitimate provider can wait while you end a call and contact them yourself. That one habit blocks many of the most common mobile-money scams in Bangladesh.