Lawful Use of GPS Trackers

Short version: lawful GPS tracking covers your own vehicle or assets, a minor child you’re legally responsible for, an adult who has given informed consent, or a company fleet vehicle you own. Covertly tracking another adult’s vehicle or belongings without their knowledge and consent is illegal in most US states under anti-stalking and electronic surveillance statutes, regardless of your relationship to them. This site does not provide, and will never provide, instructions for tracking someone without legal right to do so.

In Plain English

Your Own Vehicle or Assets

Tracking a vehicle, trailer, boat, or piece of equipment that you own outright is the clearest and least legally complicated use case — theft recovery, monitoring a vehicle lent to a friend, or simply knowing where a valuable asset is. This is the most common and most straightforward lawful use of a GPS tracker.

Minor Children

Tracking a minor child you are the legal parent or guardian of — whether via a device in their car, backpack, or on their person — is a widely accepted and generally lawful form of parental monitoring in the US. This changes at the age of legal majority (18 in most states): tracking an adult child without their knowledge and consent falls under the same restrictions as tracking any other adult, regardless of the parent-child relationship.

Consented Adults

Tracking an adult — a partner, a family member, an employee using a personal vehicle for work — is lawful specifically when that person has given informed consent, ideally in a form you can document. Consent given for one purpose (family location-sharing apps, for example) does not automatically extend to covert tracking via a separate hidden device; the consent needs to be genuine and reasonably informed about what’s actually being tracked.

Company Fleet Vehicles

Businesses tracking vehicles they own is one of the most well-established and clearly lawful uses of GPS tracking — for route optimization, theft recovery, and driver safety. Some states and some union agreements require notifying employees that company vehicles are tracked, so check your state’s specific employee-monitoring notification requirements before implementing fleet tracking.

What Is Illegal: Stalking and Tracking Without Ownership or Consent

Covertly placing a tracker on a vehicle you don’t own, or tracking an adult without their knowledge and consent, is illegal in most US states — this includes tracking an ex-partner, a spouse during separation or divorce, a coworker, or any adult outside the ownership and consent situations described above. Many states have laws specifically naming GPS or electronic tracking devices, either within their anti-stalking statutes or as standalone offenses (California Penal Code 637.7 is one example), meaning this isn’t just a general privacy concern but a specifically criminalized act in many jurisdictions. This site does not describe how to covertly track a person without legal right to do so, and will not.

Employees and Contractors

Tracking a vehicle you own — a company car, van or truck assigned to an employee for work duties — is generally the lawful, well-established use case discussed under company fleets above. It gets legally murkier the moment the vehicle belongs to the employee or contractor rather than the business, since ownership is the deciding factor, not who's driving. A written policy disclosed to staff before any tracking begins is the standard, defensible practice among businesses that track company-owned vehicles, and some states specifically require that kind of notice. Tracking a contractor's own personal vehicle without their knowledge sits outside the clearly lawful category described earlier in this guide, regardless of whether they're currently working for you.

Separation, Divorce and Custody: Talk to an Attorney First

Tracking during a separation or divorce is one of the most legally sensitive scenarios covered on this page, and it is also one of the most common reasons people search for guidance like this. A vehicle titled jointly, or solely to a spouse who is not the one placing the tracker, does not automatically fall into the "your own vehicle" category described above just because the couple is still legally married. Placing a tracker on a spouse's vehicle without their knowledge during a separation carries real legal risk in many states, and — separately from any criminal exposure — evidence gathered through unlawful tracking can also be inadmissible or damaging in a family court proceeding. Anyone in this situation should talk to a family law attorney in their state before placing a tracker, not after.

Phone Location-Sharing Apps vs Dedicated Trackers

The same ownership-and-consent framework covered throughout this guide applies whether the tracking method is a dedicated hardware GPS tracker hidden in a vehicle or a location-sharing app installed on someone's phone without their knowledge. A family location-sharing app that every household member knowingly opted into is a fundamentally different situation, legally and ethically, from the same app installed covertly on a partner's or ex-partner's phone. The technology is not the legal test — ownership of the device or vehicle, and genuine informed consent from the person being tracked, are what matter under most state statutes.

If You’re Concerned You’re Being Tracked (General Information, Not Legal Advice)

If you suspect an unauthorized tracker has been placed on your vehicle or among your belongings, document what you find and consider contacting law enforcement, particularly if you have safety concerns. This is a matter for law enforcement and, where appropriate, an attorney — not a DIY countermeasure situation. For Bluetooth item trackers such as an AirTag, Apple notes that iPhones and Android phones (Android 6.0 and later) can alert you when an unknown tracker separated from its owner is moving with you, and that law enforcement can request information from Apple about the item. A number of standalone RF/Bluetooth tracker-detector devices also exist on the market for people who want to periodically sweep a vehicle themselves; treat any positive finding as a starting point for reporting the device, not as the end of the process.

Documenting Lawful Tracking Use

Even in the clearly lawful situations described above — a company fleet, a consenting adult, an owned personal vehicle — keeping simple documentation is good practice, not just a legal safety net. A dated written notice to employees, a signed consent form for an adult being tracked, or even a text message confirming someone agreed to being tracked, can matter later if a tracking decision is ever questioned. This is a low-cost habit that protects both the person placing the tracker and the person being tracked, and it is worth building into any ongoing tracking arrangement from the start rather than after a dispute arises.

Going Deeper: How the Law Draws the Line on Tracking

At the federal level, the key statute targets conduct and intent rather than any particular device. 18 U.S.C. § 2261A(2) makes it a crime to use the mail, an interactive computer service, or an electronic communication service or system of interstate commerce with intent to kill, injure, harass or intimidate another person, or to place them under surveillance with that intent, where that course of conduct places the person in reasonable fear of death or serious bodily injury, or causes, attempts to cause or would reasonably be expected to cause substantial emotional distress.

Many states go further and name tracking devices directly. California Penal Code § 637.7 states that “no person or entity in this state shall use an electronic tracking device to determine the location or movement of a person,” defines an electronic tracking device as one attached to a vehicle or other movable thing that reveals its location by transmitting electronic signals, and treats a violation as a misdemeanor. Its main exception is the one this page is built around: the section does not apply when the registered owner, lessor or lessee of a vehicle has consented to the device on that vehicle.

Courts treat attaching a tracker to someone else’s vehicle as a serious intrusion even when the government does it. In United States v. Jones, decided January 23, 2012, the Supreme Court held that “the Government’s installation of a GPS device on a target’s vehicle, and its use of that device to monitor the vehicle’s movements, constitutes a ‘search’” under the Fourth Amendment. That case governs law enforcement rather than private individuals, but it shows how the law views a device placed on property that is not yours.

Phone-based tracking follows the same logic. The FTC describes stalkerware as software someone installs on your phone or other device without your knowledge, and warns that removing it could escalate an abuser’s behavior. It recommends contacting the National Domestic Violence Hotline (1-800-799-7233) and making a safety plan first, which is why this page points people who suspect tracking toward documentation and law enforcement rather than do-it-yourself countermeasures.

Ready to Choose a Tracker?

With the legal framework understood, see a ranked list of GPS trackers for ranked picks suited to lawful vehicle, asset and family tracking.

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