That friendly wrong-number text is the start of a scam
“Hi Linda, are we still on for lunch Thursday?” You are not Linda. You text back to say so, because you were raised right. “Oh no, so sorry! Wrong number. You seem nice though, haha.” And that is the whole con, right there, in two messages. Not the lunch. The haha.
I think of it as a houseguest who moves in one bag at a time. The first bag is tiny and you barely notice it in the hall. By the time the furniture arrives, you have been having coffee with them for a month and it would feel rude to ask who they are.
How it goes
The first bag is small talk. Where you live, what you do, the weather. Then photos: a dog, a kitchen, a day at the beach, all borrowed from someone else’s social media. A week in, the stranger has a name, a job, and a reason to text you good morning. The messages are warm and a little lonely, and they are aimed with care at people who answer the phone and answer texts, which, if we are honest, means our parents more than it means us.
The furniture arrives in the second or third week. Your new friend mentions an investment, usually crypto, usually with a screenshot of a balance going up. Or there is an emergency: a hospital bill, a stuck shipment, a nephew in trouble. Or the ask is smaller and stranger: gift cards, because “it is faster”. The one thing every version has in common is a request for secrecy. Do not tell your son, he will not understand. The FBI’s own complaint center puts the yearly losses from this kind of fraud in the billions, and the typical first contact is a text that seems to have reached you by mistake.
Why the first reply matters
Replying “wrong number” feels harmless. To the sender it is a green light: this line is live, a person reads it, and that person is polite. Numbers that reply get sold onward at a higher price than numbers that do not. So the best answer to a wrong-number text from a stranger is no answer. Not “sorry, wrong number”, not “who is this”, nothing. If the real Linda’s real friend texted you by accident, they will figure it out on their own.
If the conversation has already started, the test is simple and it has nothing to do with how nice they seem. Did a stranger start it, and has anyone now asked for money, crypto, gift cards, or quiet? If yes to both, stop, block, and tell someone. The telling is the hard part, because the con is built to make it embarrassing. It is not embarrassing. It is the most common text scam in the country, and the people running it do this all day with a script.
What the app does about it
TextMeNot is a texting app for Android that screens junk before it reaches the inbox, and the newest thing in it was built for exactly this. The app knows which conversations were started by a stranger, meaning a number not in your contacts who texted first. If a later message in one of those conversations asks for money, crypto, gift cards, an emergency, or secrecy, a warning appears above the thread in plain words, with two large buttons: I know this person, and Block. It does not delete anything or decide for you. It puts the question where it belongs, in front of you, before you answer.
A friendly opener from a stranger gets a quieter version of the same banner, so the first bag gets noticed in the hall. Texts from your contacts and conversations you started are never touched, and nothing you receive is sent anywhere. There is no account to set up, which matters if you are installing this on a parent’s phone and will not be there to reset a password.
It is free for your first 20 screened texts and 20 screened calls, on Google Play for Android phones in the United States. The one thing to know before you switch is that it uses SMS and MMS rather than RCS chat, which is explained here.
And if you are the adult child reading this because it already happened: the houseguest is gone, the furniture can be dealt with, and nobody who answers a polite text politely did anything wrong. Lock the door, then go have coffee with the person who actually lives there.