Montana Recording, Tracking & Surveillance Laws

At a glance

Adult subject — e.g., a spouse

Your own minor child

As a parent you generally have broad authority to monitor your own minor child — especially on a phone, computer, or vehicle you own or provide. The gray area is recording the child's conversations with other people, where wiretap law and the “vicarious consent” doctrine come in and outcomes vary — and if you're co-parenting, custody orders and the other parent's rights matter. Those are marked “seek legal advice.”

General (any subject)

Recording & consent

Montana is an all-party consent state — with an announcement exception. Its privacy-in-communications law (MCA § 45-8-213) bars recording a conversation with a hidden device without the knowledge of all parties. But if one party announces that recording is happening, either party may record. In practice: don't record secretly. A violation is a misdemeanor, with penalties rising for repeat convictions.

The statute targets hidden recording, so public conversations with no reasonable expectation of privacy are exempt. The federal overlay still applies.

Recording law enforcement

Recording on-duty police in public is protected by the First Amendment — Montana sits in the Ninth Circuit — as long as you don't physically interfere. Because § 45-8-213 targets hidden recording, openly recording police in public isn't barred.

GPS & vehicle tracking

Montana has no statute written only for GPS trackers, but surreptitious surveillance of a person is covered by MCA § 45-5-223, and stalking law can apply. Tracking a vehicle you own is generally fine; secretly tracking someone else can be criminal. Note that § 45-5-223 has an exemption for licensed private investigators acting within the scope of a legitimate investigation. Treat non-consensual tracking as a lawyer question.

Private-investigator licensing

Montana requires a state license to work as a private investigator, under MCA § 37-60-301 and following, through the Board of Private Security (Dept. of Labor & Industry). Applicants need about three years / 5,400 hours of qualifying experience and must carry commercial liability insurance.

Out-of-state investigator reciprocity

Montana's Board of Private Security doesn't publish a general reciprocity license we could confirm — an investigator licensed elsewhere normally needs Montana licensure to work here. Confirm current terms with the board before working a Montana case.

Hidden cameras in private areas

Secretly observing or recording someone in a private residence, or in a public place where they reasonably expect privacy (a restroom or changing room), without consent is surreptitious visual observation in Montana (MCA § 45-5-223). Hidden cameras in private areas are off-limits — though the statute exempts licensed PIs acting within a legitimate investigation.

Cameras in your own home / nanny cams

You can put cameras in your own home, including nanny cams in common areas. The limits: don't aim a camera at a space a guest, tenant, or worker would reasonably treat as private (a bathroom, or a live-in caregiver's bedroom) — that risks § 45-5-223 — and remember Montana is all-party for audio, so a hidden mic capturing others' conversations violates § 45-8-213 even at home.

Doorbell & outdoor cameras

A doorbell or outdoor camera covering your own porch, yard, or the street is fine for video — no reasonable expectation of privacy in public view. Trouble starts if you point a camera into a neighbor's window or fenced yard, or if the mic captures others' private conversations (all-party audio). Aim at your property, not through someone else's walls.

Workplace & employee recording

Because Montana is all-party (with the announcement exception), recording a workplace conversation generally needs everyone's knowledge. Secretly recording is a misdemeanor under § 45-8-213. Employers who monitor email or work systems should give clear notice, and federal workplace rules can apply.

Drone surveillance

Montana has no dedicated drone-privacy statute. A drone used to surveil someone in a private residence or where they reasonably expect privacy can be reached by the surreptitious-observation statute (MCA § 45-5-223), and trespass or stalking law can apply. General flight and filming from public vantage points remain legal; because coverage runs through those statutes, treat drone surveillance of people as a lawyer question. FAA rules govern the airspace.

See an error or an out-of-date citation? Please let us know.

General legal information only, not legal advice, and no attorney-client relationship is created by reading it. Statutes and their interpretation change; entries may be incomplete or outdated. We disclaim all warranties and any liability for reliance on this page. Confirm the current law at the official Montana Codes and consult a licensed Montana attorney before recording, tracking, installing cameras, or gathering evidence.