Montana Audio Recording Laws: All-Party Consent Rules and Penalties (2026)

Montana requires all parties to know when a private conversation is being recorded under Mont. Code Ann. 45-8-213. A warning exception makes recording lawful once any participant announces that recording is taking place, without requiring the other party to consent.

Montana has one of the more distinctive audio recording laws in the United States. While the state is often grouped with two-party consent states, Montana's approach differs in important ways. Under MCA 45-8-213, it is illegal to record a private conversation using a hidden electronic or mechanical device without the knowledge of all parties. However, the statute includes a warning exception that sets Montana apart from virtually every other state.

Understanding how Montana's audio recording law works is essential for residents, businesses, journalists, and legal professionals. A recording violation is a misdemeanor, and the statute does not raise that penalty for repeat recording convictions, but a conviction is still a criminal record worth avoiding.

What Does MCA 45-8-213 Prohibit?

The core audio recording prohibition is found in MCA 45-8-213(1)(c). A person commits the offense of violating privacy in communications if the person knowingly or purposely records or causes to be recorded a conversation by use of a hidden electronic or mechanical device that reproduces a human conversation without the knowledge of all parties to the conversation.

Several elements of this language are worth breaking down.

The "Hidden Device" Requirement

Montana's statute specifically targets recordings made with hidden devices. This is a meaningful distinction from states like California or Florida, where the consent requirement applies regardless of whether the recording device is visible.

If a recording device is in plain view and obvious to all participants, the legal analysis changes. A phone placed face-up on a conference table with its recording app visible, for example, may not meet the "hidden" threshold. However, activating a concealed recorder in a pocket, bag, or hidden location clearly falls within the statute's prohibition.

The statute does not define "hidden," and no Montana appellate decision explaining it was located, so whether a device counts as hidden will depend on the facts, such as whether it was concealed and whether the other people could see it. The safest practice is to always provide a verbal warning, regardless of device visibility.

The "Knowledge of All Parties" Standard

Montana requires knowledge, not consent. This is another important distinction. In strict two-party consent states, the other party must affirmatively agree to the recording. In Montana, the other party simply needs to know the recording is happening. They do not need to approve of it.

This knowledge requirement connects directly to Montana's warning exception, which provides a clear mechanism for satisfying it.

The Warning Exception

Montana's most distinctive feature is the warning exception found in MCA 45-8-213(2)(a)(iii). The recording prohibition does not apply when one party to the conversation has warned all other parties that the conversation is being recorded.

How the Warning Exception Works

The warning exception operates as follows:

• Any party to the conversation may provide the warning. It does not need to be the person operating the recording device.
• The warning must be given before or at the start of the recording. A warning given midway through a conversation does not retroactively legalize the earlier portion.
• No specific language is required. Phrases like "I am recording this conversation," "This call is being recorded," or "I want to let you know this is being recorded" all satisfy the requirement.
• The other party does not need to consent. They only need to receive the warning.
• If the other party objects to being recorded, their remedy is to leave the conversation or hang up the phone. The recording party is not required to stop recording simply because someone objects after being warned.

Warning vs. Consent

This distinction between warning and consent is what makes Montana more permissive than states like California, Florida, or Illinois. In practice, Montana's warning exception makes it function similarly to a one-party consent state, with the added requirement of providing notice.

The practical result: if you announce "I am recording this conversation" at the beginning, you can lawfully record under Montana state law, even if the other party protests.

Other Exceptions to the Recording Prohibition

Beyond the warning exception, MCA 45-8-213(2)(a) provides several additional exceptions where the recording prohibition does not apply.

Public Officials Exception

The first exception covers recordings made by elected or appointed public officials and public employees "when the transcription or recording is done in the performance of official duty." It applies to officials who record as part of their job. No Montana court has read it to let a private person secretly record a police officer or other official, so do not rely on it for that. Recording an officer openly, or after a warning, is what keeps a citizen outside MCA 45-8-213(1)(c). For the general rules, see is it illegal to record someone.

Public Meetings Exception

Persons speaking at public meetings may be recorded without notice or consent. This aligns with Montana's Open Meetings laws under MCA Title 2, Chapter 3, Part 2, which support transparency in government proceedings.

Healthcare Emergency Calls

Recordings made by a health care facility or government health agency of emergency medical communications are exempt from the consent requirement.

Criminal Penalties: Montana's Graduated System

Montana uses a graduated penalty structure. Importantly, the escalation tiers apply to the harassment and extortion offenses under (1)(a)/(1)(b) and the intimate-image offenses under (1)(d)/(1)(e), not to recording violations under (1)(c). A first, second, or subsequent recording violation under (1)(c) carries the same misdemeanor penalty.

First Offense

A first violation of MCA 45-8-213(1)(c) is a misdemeanor punishable by:

• Up to 6 months in the county jail
• A fine of up to $500
• Or both jail time and a fine

Second Offense

A second violation of subsections (1)(a) or (1)(b) (harassment, threats, and related communications offenses) is a misdemeanor punishable by:

• Up to 1 year in the county jail
• A fine of up to $1,000
• Or both

Third and Subsequent Offenses

A third or subsequent violation of subsections (1)(a) or (1)(b) escalates to a felony punishable by:

• Up to 5 years in the Montana State Prison
• A fine of up to $10,000
• Or both

Non-Consensual Intimate Image Offenses (2025 Amendment)

Subsection (1)(d), which predates 2025, makes it a crime to distribute intimate images of an identifiable person to harass or injure them. The 2025 amendment (Ch. 686, L. 2025) extended it to AI-generated ("digitally fabricated") images and to disclosures made to obtain money, and added a new sextortion offense in subsection (1)(e). Penalties for both:

• First offense: Misdemeanor
• Second or subsequent offense: Felony, up to 5 years in prison and a $25,000 fine

Montana's Constitutional Right to Privacy

Montana provides an additional layer of privacy protection through its state constitution. Article II, Section 10 of the Montana Constitution declares that "the right of individual privacy is essential to the well-being of a free society and shall not be infringed without the showing of a compelling state interest."

This constitutional provision is among the strongest privacy protections of any state in the country. It restricts government intrusion. The Montana Supreme Court recognized a damages claim for its violation in Dorwart v. Caraway (2002), a case against government officials, and it is not a separate basis for suing a private person who records you.

The Montana Supreme Court has interpreted this provision broadly, recognizing privacy interests in personal communications, medical records, and other sensitive information. For audio recording, this matters most when police record: in State v. Allen (2010) the court held that warrantless recording of a phone call by an informant acting for police violated Article II, Sections 10 and 11, even with one participant's consent.

How Montana Compares to Federal Wiretap Law

Federal wiretap law, codified at 18 U.S.C. 2511, uses a one-party consent standard. Under federal law, a participant in a conversation may record it without informing the other parties. Interception by someone who is not a party and has no party's consent is generally a federal crime.

Montana's all-party knowledge requirement is stricter than the federal baseline. Federal law establishes a floor for privacy protections, not a ceiling. States are free to impose greater restrictions, and Montana has done so. A recording that would be legal under federal law may still be illegal under Montana state law if the hidden device and knowledge requirements are not met.

Federal law does not override Montana's stricter rule for a recording made in Montana. When a call crosses state lines, no Montana law settles which state's rule applies, so the safe practice is to follow the strictest rule that could apply. A Montana resident recording a call with someone in a one-party consent state should still provide a warning to comply with Montana law.

Recording Across State Lines

Interstate recordings present additional complications because the laws of multiple states may apply simultaneously.

General Principles

• No Montana statute or court decision settles which state's rule governs an interstate call, so the safe practice is to satisfy Montana's warning requirement whenever a Montana participant is on the call.
• Federal law permits one-party consent, but this does not override Montana's stricter requirement.
• When calling someone in a stricter all-party consent state (like California or Florida), follow that state's rules in addition to Montana's.
• Montana's "warning" approach may not satisfy another state's "consent" requirement, so obtaining explicit verbal consent is the safest approach for interstate calls.

Practical Recommendation

For any interstate call involving a Montana participant, the safest approach is to:

1. Announce at the start of the call that the conversation is being recorded (satisfies Montana law).
2. Ask the other party if they consent to the recording (satisfies stricter consent states).
3. If the other party declines, stop recording or end the call. Before placing a call like this, you can compare the two states' recording rules directly.

Admissibility of Illegally Obtained Recordings

MCA 45-8-213 does not say that an illegally made recording is inadmissible. Whether a private recording can be used in court is decided by the judge under Montana's rules of evidence. Do not assume an unlawfully made private recording will be thrown out, and do not assume it will be allowed in.

Recordings made by police, or by an informant acting for police, are different. Under State v. Goetz (2008) and State v. Allen (2010), warrantless recording of that kind can violate the Montana Constitution and be suppressed. Making a hidden recording can also be a crime even if the recording is later admitted.

Civil Remedies for Illegal Recording

Montana's recording statute does not provide a specific civil cause of action. However, victims of illegal audio recording can pursue civil claims under other legal theories:

• Invasion of privacy: A common law tort recognized in Montana.
• Constitutional privacy claims: Under Article II, Section 10 of the Montana Constitution, but only against government actors; the provision is not a basis for suing a private individual.
• Intentional infliction of emotional distress: When the recording causes severe emotional harm.
• Negligent infliction of emotional distress: In appropriate circumstances.

Whether any of these claims succeeds depends on the facts, so a person secretly recorded by a private individual should talk to a Montana attorney about the common-law options.

Audio Recording in Business Settings

Montana businesses that record customer calls, meetings, or other interactions must comply with MCA 45-8-213.

Call Recording

• An automated message at the start of a call telling callers the call is being recorded is the clearest way to give the warning MCA 45-8-213(2)(a)(iii) describes. No Montana court has decided whether a "this call may be recorded" message is enough, so say that the call is being recorded rather than that it may be.
• The statute asks for a warning, not consent, so the caller does not need to press a button or say yes.
• Businesses should document their warning practices as part of standard operating procedures.

Meeting Recording

• For recorded meetings, a verbal announcement at the beginning satisfies the warning requirement.
• Meeting organizers should state clearly that the meeting is being recorded and note this in meeting minutes.
• If attendees join after the announcement, provide the warning again to new participants.

Employee Monitoring

• Employers recording calls or meetings should give a clear warning at the start of each recording; a written policy alone may not be enough under Montana's warning rule, which no court has construed.
• Notice should be documented in employee handbooks and acknowledged in writing.
• For public employers, monitoring personal communications on government equipment may also raise issues under Montana's constitutional privacy protections, which restrict government action.

Wearable Devices and AI Audio Recorders

Wearable recording devices such as smartwatches, AI-powered voice recorders, and smart glasses all fall under MCA 45-8-213 when they capture audio. Montana law does not distinguish between a hidden phone recorder and a hidden wearable device. The same rules apply: provide a warning before recording any private conversation.

A smartwatch or smart glasses worn openly may not count as a "hidden" device, and MCA 45-8-213(1)(c) applies only to hidden devices. But whether a small wearable is hidden is a fact question no Montana court has answered, so giving a clear verbal warning before recording a private conversation is the safe practice.

For any wearable recording device, the safest practice is to provide a clear verbal warning before capturing audio, regardless of how visible the device appears.

TAKE IT DOWN Act (Federal, May 19 2025)

The TAKE IT DOWN Act, signed May 19, 2025 (Pub. L. 119-12), is a federal law that criminalizes publishing non-consensual intimate images (NCII), including AI-generated deepfakes, without a victim's consent. The Act's one-year platform-compliance deadline of May 19, 2026 has now passed. Platforms receiving a valid takedown request must remove the content within 48 hours. Knowingly publishing such images, or threatening to, is a federal crime. A platform that fails to run the required notice-and-removal process is treated as committing an unfair or deceptive practice and faces enforcement by the Federal Trade Commission. The Act does not create a right to sue; a separate federal law, 15 U.S.C. 6851, lets a person sue over the nonconsensual disclosure of intimate images.

The TAKE IT DOWN Act overlays Montana's existing NCII provisions in MCA 45-8-213(1)(d) and (1)(e). Montana law addresses the criminal act of distributing or threatening to distribute the images; the federal Act adds federal crimes and a rapid takedown duty for online platforms, enforced by the FTC. Both frameworks apply simultaneously in Montana.

More Montana Recording Laws

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Frequently Asked Questions

Is Montana a one-party or two-party consent state for audio recording?

Montana is technically an all-party consent state, but with a significant caveat. Under MCA 45-8-213, recording a conversation with a hidden device requires the knowledge of all parties. However, Montana's warning exception allows lawful recording once any party announces that recording is taking place. The other party does not need to agree, only to be informed. This makes Montana less restrictive than strict two-party consent states like California or Florida.

What is the penalty for illegally recording a conversation in Montana?

Penalties follow a graduated structure. A first offense is a misdemeanor carrying up to 6 months in jail and a $500 fine. A second offense for harassment-related violations carries up to 1 year in jail and a $1,000 fine. A third or subsequent harassment-related offense is a felony with up to 5 years in prison and a $10,000 fine. Those higher tiers do not apply to recording: every recording conviction under (1)(c) carries the same misdemeanor penalty. The statute does not make an illegally made recording inadmissible; admissibility is decided under Montana's rules of evidence.

Do I need consent or just a warning to record audio in Montana?

You need to provide a warning, not obtain consent. Under MCA 45-8-213(2)(a)(iii), if one party warns all other parties that the conversation is being recorded, either party may then record lawfully. The other party does not need to agree. If they object, their option is to leave the conversation or hang up.

Can I use a voice recorder app on my phone in Montana?

Yes, as long as you provide a warning to all other parties before recording. A phone used as a concealed recording device without warning violates MCA 45-8-213(1)(c). However, if you announce that you are recording, the warning exception makes the recording lawful. Placing the phone visibly on a table may also reduce the 'hidden device' concern, but a verbal warning is still the safest practice.

Are secretly recorded conversations admissible in Montana courts?

Not automatically either way. MCA 45-8-213 contains no rule excluding an illegally made recording, so a judge decides admissibility under Montana's rules of evidence. Recordings made by police, or by an informant acting for police, without a warrant can be suppressed under the Montana Constitution (State v. Allen, 2010). Making the hidden recording can still be a crime even if it is admitted.