Tracker stalking
In plain terms
A small tracker, designed to find keys, slipped into a bag or fixed under a vehicle. It costs almost nothing, fits in a pocket, and reports its position continuously.
Definition
Tracker stalking is the misuse of a personal-item tracker to follow a person's movements without their knowledge, by hiding it in their belongings or vehicle.
How it works
These trackers don't contain GPS: they emit a signal picked up by nearby phones, which relay the position back to the owner. That's what explains their several-month battery life and small size, and it's also what makes them accurate in cities, where phones are numerous. Misused, they enable continuous tracking with no technical skill, for the price of an off-the-shelf consumer item. Manufacturers have added unknown-tracker alerts, now present on the major mobile systems, but they assume the person being tracked carries a compatible phone with notifications turned on.
Warning signs
- Phone notification warning that an unknown tracker is moving with you
- A short, unexplained chime coming from a bag or a vehicle
- Someone who knows your movements without you having told them
- An unfamiliar object found in a lining, under a seat, or in a bumper
How to verify
Respond to the phone's alert if you receive one: it offers to make the tracker chime and to display its identifier. The major systems also offer a manual search for nearby trackers. If in doubt, methodically search linings, bag pockets, seats and wheel wells.
What to do
Leave unknown-tracker notifications on and Bluetooth switched on — they're what makes the alert possible. A tracker you find shouldn't be destroyed: it carries an identifier that can be traced back to its owner.
If it already happened
Don't disable it immediately if you fear for your safety: its disappearance would warn the person tracking you, as with stalkerware. Photograph it in place, note its identifier, and file a police report — the identifier can be used by law enforcement. In France, the 3919 helpline supports situations of abuse, which is most often the context for this kind of tracking.
Frequently asked questions
- My phone alerted me — what should I do first?
- Make it chime to locate it and note its identifier, without removing it if you're in a situation where its disappearance could put you at risk. The identifier is the useful piece: it ties the object to an account.
- Do these alerts work on every phone?
- The major mobile systems offer them, but they require a compatible, up-to-date phone with Bluetooth and notifications on. A manual search is still possible, and a methodical physical search doesn't depend on any device.
Related attacks
Official sources
This article is part of the Phones and connected devices family. Last updated: 2026-09-03.