If you have found a GPS tracker on your car, leave it where it is, photograph it in place, and call your local police non-emergency line. That device is evidence, and how you handle the next hour or two shapes what investigators can do with it. Before anything else, though: if there is any chance the tracker was planted by an abusive partner, ex, or stalker, stop and read the next section first. Your safety comes ahead of the device.
If You Suspect Stalking or Domestic Violence, Start Here
A tracker planted by someone dangerous is not only a privacy problem. It means that person knows where you are in real time, and a sudden change in your routine or an obvious removal of the device can tell them you have discovered the surveillance. That is when situations escalate.
Before you do anything visible, contact the National Domestic Violence Hotline at 1-800-799-7233. You can also text “START” to 88788 or use the live chat on their website. Their advocates are trained in technology-facilitated abuse and can help you plan the next steps in a way that accounts for the tracker. If you believe you are in immediate danger, call 911.
Do not search for information about GPS trackers or stalking on a shared computer or on a phone the other person can access. Use a friend’s phone, a work device they don’t touch, or a library computer. A domestic violence advocate can also coordinate with law enforcement on your behalf, so the tracker becomes part of a criminal case without you having to act alone.
Document the Device Before You Touch It
Do not pull the tracker off. Investigators need to see exactly where and how it was placed, and yanking it into a plastic bag strips out context that can matter later in a prosecution.
Take clear, well-lit photos from multiple angles. Capture the device’s exact position on the vehicle, any serial numbers or markings, and how it is attached. Get wide shots that show where it sits on the car, and close-ups that show detail. Write down the date, time, and location of your discovery, and describe the device: size, color, wires, antennas, indicator lights.
If you have to handle it for any reason, wear gloves. Fingerprints on the housing can tie the device to whoever placed it, and contaminating that surface makes the investigator’s job harder. If your phone alerted you to a Bluetooth tracker like an AirTag or Tile, screenshot the alert.
Call the Police
Use your local police department’s non-emergency line. Save 911 for a situation where someone is actively threatening you. Tell the dispatcher you have found an unauthorized GPS tracking device on your vehicle and want to file a report.
When an officer arrives, hand over what you gathered: photographs, written notes, screenshots, and the device itself if they collect it. Police can sometimes trace a tracker to whoever bought it through serial numbers, cellular account information, or the app account tied to the device. A report also creates an official record, which strengthens any later criminal charges or civil case.
If you suspect a specific person, tell the officer. Circumstantial suspicions still give investigators a direction. If the person is an ex-partner or someone you have had conflict with, mention prior threats or incidents.
Could the Tracker Be Legitimate?
Not every GPS device on a car is illegal. Rule these out before assuming a crime.
Financed or Leased Vehicles
Buy-here-pay-here dealerships and some subprime lenders install GPS trackers on financed cars to locate them for repossession. This is legal when the dealer discloses the device and gets your written consent before you sign. The disclosure should appear in your retail installment contract or a separate addendum, identifying the device and its purpose. Pull out your paperwork and look for that language. If it isn’t there, contact the dealership and ask directly.
Rental Cars
Some rental fleets carry GPS units for fleet management and theft recovery. A growing number of states require written disclosure in the rental agreement, so check the contract.
Employer Vehicles
If you drive a company car, your employer can legally track it. Most employer policies include tracking disclosure in the handbook or the vehicle use agreement.
Parents and Minor Children
A parent generally has the legal right to place a tracker on a vehicle they own that their minor child drives.
If none of these fit, treat the device as unauthorized.
What the Law Says About Unauthorized Tracking
Placing a GPS tracker on someone else’s vehicle without consent is illegal in nearly every state, though the specific charge varies. Some states have a dedicated tracking offense. Others prosecute the conduct as stalking, harassment, or unlawful surveillance. Penalties range from misdemeanors carrying fines and up to a year in jail, up to felony charges with several years of imprisonment.
Federal Stalking Law
When tracking crosses state lines or uses interstate communication networks, the federal stalking statute applies. It criminalizes using the mail, electronic communications, or any interstate commerce facility to engage in conduct that places someone in reasonable fear of death or serious injury, or causes substantial emotional distress. Surveillance carried out with intent to harass or intimidate is written into the statute.1Office of the Law Revision Counsel. 18 U.S. Code 2261A – Stalking
Because most trackers report location over cellular networks, and cellular networks are interstate commerce facilities, federal jurisdiction can attach even when the car and the tracker never leave one state. Federal penalties reach up to five years for stalking, with higher ceilings tied to injury. Violating a protective order while stalking carries a mandatory minimum of one year.2Office of the Law Revision Counsel. 18 U.S. Code 2261 – Interstate Domestic Violence
If the Tracker Came From Police
Law enforcement cannot place a GPS tracker on your vehicle without a warrant. The Supreme Court held in United States v. Jones that attaching a GPS device to a car and using it to monitor movements is a search under the Fourth Amendment.3Legal Information Institute. United States v. Jones Evidence gathered from a warrantless tracker can be suppressed, and you may have grounds for a civil rights claim.
Civil Remedies and Protective Orders
Criminal prosecution is one track. You also have civil options. An attorney who handles privacy or harassment cases can evaluate a lawsuit for invasion of privacy, intentional infliction of emotional distress, or both. These claims can produce compensation for the anxiety and disruption that surveillance causes.
If you know or suspect who placed the device, an attorney can help you petition for a protective order. Courts can issue orders that specifically prohibit electronic monitoring, and violating one while continuing to stalk someone triggers the federal one-year mandatory minimum.2Office of the Law Revision Counsel. 18 U.S. Code 2261 – Interstate Domestic Violence You do not need a criminal conviction, or even charges, to request one. Most jurisdictions let you petition the court directly with evidence of the harassment.
Talk to a lawyer early. Privacy and stalking laws vary widely by state, and what qualifies as a criminal offense in one place may need different evidence or carry different penalties in another. A local attorney will know which statutes fit your facts and whether the case supports criminal and civil action at the same time.
Check for More Devices
If you found one tracker, there may be others. A visual sweep catches the obvious ones. Hardwired units and professionally concealed devices are built to blend into the wiring.
Start with a Bluetooth scan from your phone. Both iPhone and Android detect unknown Bluetooth trackers traveling with you. On iPhone, open Find My, tap Items, and scroll to “Unknown Items Detected with You.” On Android, run a manual scan with the Tracker Detect app; if it finds an unknown device that has stayed with you for at least ten minutes, it can play a sound so you can locate it.
Handheld RF signal detectors can pick up transmissions from active trackers. Look for one that covers a broad frequency range, ideally up to at least 10 GHz, since modern devices use GSM, 3G, 4G, 5G, Bluetooth, and Wi-Fi. The limitation: a detector only catches a tracker while it is transmitting. A device that reports once every few hours, or logs passively and uploads in short bursts, will be invisible most of the time.
The professional option is a Technical Surveillance Countermeasures sweep. Licensed investigators use specialized equipment to detect hidden devices. A vehicle sweep typically runs between $500 and $3,500, with a mid-range sweep from an established firm around $2,000. If you are dealing with a serious stalking situation, or if your case is already in front of law enforcement or a court, the sweep also produces documentation you can use as evidence.