👋 "Hi Mum" WhatsApp Scam — Is That Message Really Your Child?

The complete guide to the fake family emergency scam — and the one call that ends it.

Sunday, 02 August 2026

The "Hi Mum" WhatsApp scam is one of the most successful scams in the UK. It's simple, emotional, and it works: a parent gets a message that looks like it's from their child, claiming a lost phone and an emergency need for money.

Thousands of UK parents have been targeted — some have lost thousands of pounds. Here's how it works and how to make sure it never happens to your family.

⚡ Quick answer: if a message from an unknown number claims to be your child asking for money, do not send anything. Call your child on their real, saved number. If they answer, the message was a scam.

How the scam works

  1. The message. You get a WhatsApp message from an unknown number: "Hi Mum, I've lost my phone and this is my new number. Can you save it?" Sometimes they name you directly.
  2. The story. Once you reply, the "child" claims an emergency: "My bank app isn't working / I'm stuck and need to pay a bill / my phone broke and I need a new one."
  3. The ask. They ask you to send money urgently — often a bank transfer to "a friend's account" because "mine is blocked".
  4. The pressure. They say they can't call (phone broken), they're embarrassed, and it's urgent — so you don't verify.

The criminals get the child's real name from social media, then run the same script on hundreds of numbers.

Why the message feels so believable

Nothing about the message is technical — it's built entirely on the person you love most:

  • It opens warmly. "Hi Mum" lands before you've thought about the number it came from.
  • It explains the number. "I lost my phone" removes the obvious question of why this isn't their usual number.
  • It explains the silence. "Don't call, I can't talk" removes the one check that would end it.
  • It adds shame. "Don't tell Dad" stops you asking anyone else.
  • It adds urgency. Money is needed now, before you have time to think.

Recognise that pattern — greeting, new number, no calls, secrecy, urgency — and the message falls apart.

The messages to watch for

  • "Hi Mum, I've dropped my phone down the toilet / lost it — this is my new number"
  • "Can you pay my bill? I'll pay you back, my banking app isn't working"
  • "Don't call me, my phone is broken — just WhatsApp"
  • "It's urgent, please don't tell Dad" (isolating you)
  • "I need £300/£500 now for an emergency"
  • "Can you send it to my friend's account instead? Mine is blocked" (a third-party account is the classic exit route)
  • The same script aimed at dads and grandparents — "Hi Dad", "Hi Nan", "Hi Grandma" — sometimes with a guessed name attached

⚠️ The one rule that stops it: if anyone messages claiming to be family asking for money, call them on their real, saved number. If they say they can't talk — that's the scam. Real family will always verify.

Check it in one phone call

  1. Don't reply to the message — replying tells the scammer the number is live
  2. Call your child on their real saved number — if they answer normally, it wasn't them
  3. Ask something only they'd know if they can't be reached — a shared memory, a pet's name, a family arrangement
  4. Try another family member — someone will usually know where they are
  5. Block and report the number once you're sure

The message usually fails at step 2. That's the whole defence.

Why it works

  • It's emotional — parents want to help their kids
  • It's vague — "my phone broke" explains why they can't call
  • It's urgent — pressure stops you thinking
  • The name is real — harvested from Facebook/Instagram

What to do if you get one

  1. Don't reply with personal details — don't confirm names or relationships
  2. Call your child on their real number — if they answer, it's a scam
  3. Ask a question only your child knows — if they can't answer, it's a scam
  4. Report the number — WhatsApp: block + report; then report to Action Fraud
  5. Forward scam messages to Action Fraud or report at actionfraud.police.uk

If you've already sent money

  1. Call your bank's fraud line immediately — bank transfers may be recoverable under APP fraud rules. See how to get your money back after a scam
  2. Report to Action Fraud — 0300 123 2040 — and get a crime reference number
  3. Tell your bank it was APP fraud (authorised push payment) — you may be entitled to a refund
  4. Check other family members — scammers often try siblings and grandparents next

Stop it spreading to the rest of the family

Once you have identified the message as a scam, warn the people the scammer will move to next:

  • Tell your other children and the grandparents — the same script is likely running on their numbers
  • Agree a family code word today — and use it in any emergency money request
  • Share the pattern, not just the warning — "new number, can't call, needs money now" is easier to remember
  • Ask them to verify before sending, no matter how convincing the message sounds

Protect your family (10 minutes)

  • Agree a family code word — used in any emergency money request
  • Set privacy on social media — limit who can see your children's names and photos
  • Save your family's real numbers in contacts — so you can verify instantly
  • Talk to older relatives — grandparents are prime targets
  • Set up WhatsApp privacy — "Who can see my info" → My Contacts, and consider hiding your profile photo from strangers

Related guides

CyberAware UK — helping families report crime, recover from scams, and stay safe online.