A stranger is messaging me on WhatsApp: how to check it
A number you don't have saved messages you on WhatsApp: a job offer, a "child" with a new number or a prize. Check before you reply.
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A stranger is messaging me on WhatsApp: how to check it
A number you don't have saved messages you on WhatsApp. Sometimes it's a real contact with a new phone, but most of these messages are scam attempts: reports from the NoCall community include more and more numbers operating through messaging apps.
1. The 3 most common scams
- Fake job offer: "Earn money liking posts" or online tasks that end up asking you for an upfront payment.
- The "child in trouble" (the "Hi Mum" scam): "Hi Mam, it's me, this is my new number", followed by an urgent request for money.
- Prize or competition: you've "won" something, but you have to pay a fee or hand over bank details to release it.
2. Check through another channel
Don't continue the conversation on the new number: ring the person on their usual number, video-call them or ask something only they would know. A real family member will be glad you checked.
3. Never share codes
Nobody genuine will ever ask you for a verification code. If someone asks for the WhatsApp code you've just received by text, they're trying to take over your account.
4. Block and report
In the chat, tap the number and choose "Block" and "Report". Report it on NoCall too, to warn other users. If a supposed relative asks you for money, first read our step-by-step guides, and if you've already lost money, report it at your local Garda station.
Why is a stranger messaging me on WhatsApp?
It may be a real contact with a new number, but most often it's a scam: fake job offers, the "child in trouble" con asking for money urgently, or prizes that demand a fee before they're released.
How do I check whether the message is genuine?
Don't play along on the new number: ring the person on their usual number or contact them another way. Be wary of urgency, sloppy wording and any request for money or verification codes.
How do I report and block the number on WhatsApp?
Open the chat, tap the number and choose "Block" and "Report". You can also report the number on NoCall to warn other users.
Sources and review
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Article details
Editorial content reviewed by NoCall with practical context for spotting suspicious calls and messages.
Received a suspicious call?
Look up the number in NoCall before sharing data, calling back, or clicking any link.
Search a phone number or a company name (ESB, Vodafone and Three...) to check if it has been reported as spam.

