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Missouri Audio Recording Laws: One-Party Consent Rules and Penalties

Independently fact-checkedEditor-reviewedLaw current as of November 1, 2026By Recording Law Editorial TeamReviewed November 2, 202614 min read

Independently fact-checked against primary sources (last audited November 1, 2026). · Reviewed by the RecordingLaw editorial team. · Law checked current as of November 1, 2026. · 8 primary sources cited on this page. How we verify our legal content

Missouri Audio Recording Laws: One-Party Consent Rules and Penalties

Missouri is a one-party consent state for phone calls under Mo. Rev. Stat. 542.402, meaning you may record a call you personally take part in without notifying the other parties. For private in-person conversations the law is unsettled, so the cautious course is to get everyone's consent. That permission does not apply if the recording is made for a criminal or tortious purpose such as blackmail or harassment.

Missouri allows individuals to record phone calls they participate in without getting permission from other parties. This one-party consent framework is established by Mo. Rev. Stat. Section 542.402, which governs the interception of wire and oral communications throughout the state. Missouri law clearly permits a participant to record a phone call or video conference, as long as there is no criminal or tortious purpose. Private in-person meetings are less settled, as explained below.

This guide covers every aspect of Missouri audio recording law, including what the statutes say, how courts have interpreted them, what penalties apply for violations, and how these rules interact with federal wiretapping law.

The Core Statute: Mo. Rev. Stat. Section 542.402

Missouri's wiretapping statute makes it a crime to intercept wire communications without authorization, and to use a device to intercept oral communications when that device transmits by radio or interferes with the transmission of the communication. However, the statute includes a clear exception for wire communications such as phone calls: a person who is a party to the call, or who has received prior consent from one of the parties, may record it. The critical condition is that the recording must not be made for the purpose of committing any criminal or tortious act.

In Missouri you may record a phone or video call you take part in without notice, but recording for blackmail or another crime or tort is not protected.
Missouri clearly allows a participant to record a call. For a private in-person conversation, the cautious course is to get everyone's consent.

The full text of the relevant exception states that the prohibition on interception does not apply to "a person not acting under law" who "intercepts a wire communication where such person is a party to the communication or where one of the parties to the communication has given prior consent to such interception."

This means you have two legal paths to record:

  1. You are a participant in the conversation and record it yourself
  2. One party to the conversation has given you permission to record, even if other parties do not know

Key Definitions Under Missouri Law

Mo. Rev. Stat. Section 542.400 defines the terms used throughout Chapter 542:

  • Wire communication covers any communication made through wire, cable, or similar connection, including telephone calls transmitted over traditional phone lines and VoIP services
  • Oral communication means any spoken words uttered by a person who has a reasonable expectation that the conversation is not being intercepted
  • Intercept means the aural acquisition of the contents of any wire communication through the use of any electronic or mechanical device, including interception by one spouse of another spouse
  • Electronic, mechanical, or other device includes any equipment capable of intercepting wire communications, but excludes hearing aids and telephone equipment used in the ordinary course of business

The distinction between wire and oral communications matters because it affects the scope of legal protection. A phone call transmitted over wires qualifies as a wire communication, while a face-to-face conversation in a private office qualifies as an oral communication.

The Criminal or Tortious Purpose Limitation

Missouri's one-party consent exception is not unlimited. The statute explicitly requires that the recording must not be made for the purpose of committing any criminal or tortious act. This limitation prevents people from using the one-party consent rule as a tool for:

  • Blackmail or extortion by recording someone to coerce them
  • Stalking or harassment by using recordings to intimidate
  • Defamation by recording with the intent to misrepresent what was said
  • Facilitating any crime by using recordings to plan or carry out illegal activity
  • Invasion of privacy by recording for purposes that constitute a civil tort

If a court finds that your recording was made with criminal or tortious intent, the one-party consent exception fails. You would face the same penalties as someone who recorded without any consent at all.

Types of Audio Recording Covered by Missouri Law

Missouri two office chairs angled toward each other with a small voice recorder on the side table between them

In-Person Conversations

Whether you can record an in-person conversation you participate in turns on an unsettled part of Missouri's statute (see the doctrinal note below). The question comes up in places such as:

  • Your home or someone else's home (while you are present and participating)
  • Offices and conference rooms
  • Restaurants, coffee shops, and other public venues
  • Vehicles
  • Outdoor public spaces

The key factor is whether the speaker has a reasonable expectation of privacy. In a quiet, closed office, the expectation of privacy is high. In a busy public space, that expectation drops significantly. Speech without a justified privacy expectation is not an "oral communication" under section 542.400(8) at all. In a private setting, the cautious course is to get everyone's consent, even when you are part of the conversation.

Doctrinal note on in-person private conversations: There is a textual ambiguity in Missouri's wiretap statute. Section 542.402.2(3)'s participant exception is worded to cover "wire communication," while the criminal prohibition in section 542.402.1(2) reaches device-based interception of "oral communication" only "when such device transmits communications by radio or interferes with the transmission of such communication," a narrower, device-behavior condition. Section 542.400(8) separately defines "oral communication" (in-person speech) to include a reasonable-expectation-of-privacy gate. The Reporters Committee for Freedom of the Press reads the statute cautiously and advises getting all parties' consent before recording a private in-person conversation; others note that an ordinary, non-transmitting recorder may fall outside subsection 1(2) altogether. Missouri courts have not definitively resolved either question. Conservative practice is to obtain all-party consent before recording a private in-person conversation where the other participants have a reasonable expectation of privacy.

Telephone Calls

Missouri law treats phone calls as wire communications protected under Chapter 542. You can record any telephone call you are a party to, including:

  • Landline-to-landline calls
  • Cell phone calls
  • Calls between landlines and cell phones
  • VoIP calls through services like Zoom, Microsoft Teams, Google Meet, or Skype

The statute does not distinguish between personal and business calls. If you are a participant, you can record.

Digital and VoIP Communications

Modern communication platforms fall under Missouri's wire communication protections. Video conferencing tools with audio components, voice messages, and internet-based calling services are all covered by the one-party consent rule. You can record a Zoom meeting, a Teams call, or a Discord voice chat as long as you are participating in the conversation.

Note that many of these platforms have their own terms of service that may address recording. Zoom, for example, has a built-in recording feature that notifies all participants by default. Using a third-party recording tool to bypass those notifications is legal under Missouri law (because you are a party), but it may violate the platform's terms of service.

Voicemail and Recorded Messages

Leaving a voicemail or a recorded message is generally considered a communication where the sender knows the message will be captured. The recipient does not need separate consent to save, replay, or share the voicemail. Missouri's wiretapping statute focuses on the interception of live communications, not the storage of messages that were recorded with the sender's knowledge.

Criminal Penalties for Illegal Audio Recording

Missouri clip-on lavalier microphone attached to a jacket lapel in tight close-up, shallow focus

Class E Felony Classification

Illegal wiretapping in Missouri is classified as a Class E felony under Mo. Rev. Stat. Section 542.402. This classification took effect on January 1, 2017, when Missouri reclassified the offense as part of a broader criminal code reform. Before that date, the offense was classified as a Class D felony.

Under Mo. Rev. Stat. Section 558.011, a Class E felony carries:

PenaltyAmount
Maximum imprisonmentUp to 4 years
Maximum fineUp to $10,000 (Mo. Rev. Stat. Section 558.002)

If the offender gained money or property through the illegal recording, the court can impose a fine of up to double the amount of the gain, even if that exceeds the standard $10,000 cap.

What Conduct Is Criminal?

Three types of conduct trigger criminal liability under Section 542.402:

  1. Intercepting wire communications without authorization, or using a device that transmits by radio or interferes with transmission to intercept oral communications
  2. Disclosing the contents of wire communications you know or have reason to know were illegally intercepted
  3. Using the contents of wire communications you know or have reason to know were illegally intercepted

This means that even if you did not personally make the illegal recording, you can face felony charges for sharing or using a recording you know was obtained illegally.

Law Enforcement Exceptions

Missouri law provides specific exceptions for law enforcement under Mo. Rev. Stat. Section 542.408. Officers can obtain court orders to intercept communications when investigating certain crimes. These court-authorized wiretaps must meet strict legal requirements, including probable cause and judicial oversight.

Civil Liability for Illegal Recording

Missouri small audio recorder and over-ear headphones resting on a stack of legal documents

Mo. Rev. Stat. Section 542.418: Private Right of Action

Mo. Rev. Stat. Section 542.418 gives victims of illegal wiretapping the right to file civil lawsuits. The statute provides for significant damages:

Damage TypeAmount
Liquidated damages$100 per day for each day of violation
Minimum damages$10,000 (whichever is greater)
Punitive damagesAvailable for willful or intentional violations
Attorney feesRecoverable by the prevailing plaintiff
Litigation costsRecoverable by the prevailing plaintiff

The $10,000 minimum applies regardless of actual harm. A victim does not need to prove financial loss to recover this amount. If the actual damages or the per-day calculation exceeds $10,000, the victim receives the higher amount.

Who Can Sue?

Any person whose wire communication was intercepted, disclosed, or used in violation of Sections 542.400 through 542.422 can bring a civil action. The lawsuit can target:

  • The person who made the illegal recording
  • Anyone who disclosed the illegally recorded contents
  • Anyone who used the illegally recorded contents

Statute of Limitations

Section 542.418 does not set its own deadline. Missouri gives five years for most claims created by statute (Mo. Rev. Stat. Section 516.120(2)) but only three years for a statutory penalty claim brought by the injured person (Mo. Rev. Stat. Section 516.130(2)), and a court could treat the $10,000 liquidated-damages floor as a penalty. To be safe, file within three years and ask a Missouri attorney about the deadline.

Federal Law and Missouri Audio Recording

18 U.S.C. Section 2511: The Federal Wiretap Act

Federal wiretap law under 18 U.S.C. Section 2511 follows a one-party consent model, matching Missouri's approach. Under federal law, a person who is a party to a conversation can record it without notifying the other participants. The federal statute also allows recording when one party has given prior consent.

For phone calls, Missouri and federal law both follow one-party consent. For in-person conversations, federal law lets a participant record (18 U.S.C. 2511(2)(d)), while Missouri's statute is unsettled, so in a private setting the cautious course is still to get everyone's consent.

Interstate Calls: Which Law Applies?

When you call someone in another state, the recording laws of both states may apply. Before you record, check which rule applies in each state with our recording consent checker. If you are in Missouri calling someone in a two-party consent state like Illinois, California, or Florida, courts have not settled which state's law governs, so the stricter law may apply. This means you may need all-party consent even though Missouri only requires one-party consent.

States bordering Missouri with stricter recording laws include:

  • Illinois requires all-party consent for recording private conversations
  • Iowa, Kansas, Nebraska, Arkansas, Oklahoma, Kentucky, and Tennessee all follow one-party consent, matching Missouri

If you regularly record calls with people in two-party consent states, the safest practice is to inform all parties and obtain consent before recording.

Recording in Specific Situations

Recording at Work

Missouri's one-party consent rule applies in the workplace. You can record phone calls with your employer, coworkers, HR representatives, or clients as long as you are participating in the call. For in-person meetings, Missouri law is unsettled, so the cautious course is to get everyone's consent or ask a Missouri employment attorney first. Common reasons employees record at work include:

  • Documenting workplace harassment or discrimination
  • Preserving verbal agreements about job duties, pay, or benefits
  • Recording performance reviews or disciplinary meetings
  • Gathering evidence for employment disputes

Your employer may have internal policies that prohibit recording. Violating a company recording policy can result in disciplinary action or termination, even though the recording itself is legal under state law. The National Labor Relations Act may protect employees who record as part of concerted activity, such as documenting unsafe working conditions.

Recording Your Landlord

You can record phone calls with your landlord if you are a participant. For private in-person conversations, Missouri law is unsettled, so the cautious course is to get consent. Tenants often record to document:

  • Verbal promises about repairs or maintenance timelines
  • Disputes about lease terms or security deposits
  • Evidence of harassment or illegal entry
  • Conversations relevant to housing code violations

Recording Medical Appointments

Patients can record phone and telehealth calls with their providers under Missouri's one-party consent law. For an in-person visit, Missouri law is unsettled, so asking the provider first is the cautious course. HIPAA does not prohibit patients from recording their own doctor visits. Recording medical appointments can help you:

  • Remember complex diagnoses, treatment plans, or medication instructions
  • Share information accurately with family members or other healthcare providers
  • Document informed consent discussions before procedures

Some medical offices have policies against patient recording. Breaking such a policy is not a crime, but a private office can refuse to continue a non-emergency visit or ask you to leave, and refusing to leave after being told to can be trespass (Mo. Rev. Stat. Section 569.140).

Recording in Family Disputes

Missouri's wiretapping statute specifically addresses spousal recording. The definition of "intercept" in Mo. Rev. Stat. Section 542.400 includes interception by one spouse of another spouse. This means recording your spouse's phone calls with third parties, when you are not a party to the call, is illegal under Missouri law.

You can, however, record phone calls between you and your spouse. Private in-person conversations fall under the same unsettled in-person rule described above. This is common in divorce, custody, and protective order cases.

Admissibility of Audio Recordings in Missouri Courts

General Admissibility Rules

Legally obtained audio recordings are generally admissible as evidence in Missouri courts. The party offering the recording must establish:

  • Authentication: Proof that the recording is genuine, unaltered, and accurately represents the conversation
  • Relevance: The recording relates to a fact that matters in the case
  • Foundation: Testimony about how, when, and where the recording was made

Illegally Obtained Recordings

Under Mo. Rev. Stat. Section 542.420, an illegally intercepted wire communication, and evidence derived from it, cannot be received in any trial, hearing, or other proceeding, civil or criminal. A recording made lawfully by a participant is not excluded: the Missouri Court of Appeals held in Phillips v. American Motorist Insurance Co. (1999) that section 542.418.1 limits only evidence from authorized wiretaps.

Family Court Proceedings

Missouri family courts regularly consider audio recordings as evidence in divorce, custody, and protective order cases. Judges evaluate recordings under the same authentication and relevance standards that apply in other proceedings. Legally recorded conversations documenting threats, verbal abuse, custody agreement violations, or financial misconduct can be powerful evidence.

Before You Record

  1. Confirm you are a party to the conversation or have consent from at least one party, and for a private in-person conversation, consider getting everyone's consent
  2. Verify your purpose is not criminal or tortious
  3. Check whether the other party is in a two-party consent state (for phone calls)
  4. Review any applicable workplace, medical, or organizational policies

During the Recording

  1. Use a reliable recording device or application
  2. Do not manipulate or edit the recording in ways that change its meaning
  3. Record the entire conversation, not selective portions
  4. Note the date, time, location, and participants for authentication purposes

After the Recording

  1. Store the recording securely to prevent unauthorized access
  2. Do not share the recording with people who have no legitimate need for it
  3. If you plan to use the recording as evidence, preserve the original file without editing
  4. Consult an attorney before using recordings in legal proceedings

Good Faith Defense

Missouri law provides a defense for individuals who relied in good faith on a court order or on the provisions of Mo. Rev. Stat. Section 542.408. The defense itself is created by Mo. Rev. Stat. Section 542.418(3), which states that good faith reliance on a court order or on section 542.408 constitutes a prima facie defense to both criminal prosecution and civil lawsuits. This defense protects law enforcement officers and others who act under judicial authorization.

Explore More Missouri Recording Laws

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Frequently Asked Questions

Can I record a conversation without the other person knowing in Missouri?

Yes for phone calls. Missouri is a one-party consent state under Mo. Rev. Stat. Section 542.402.2(3), so you can record a call you participate in without telling the other parties, as long as your purpose is not criminal or tortious. For a private in-person conversation the law is unsettled: the participant exception is written for wire communications, and no Missouri appellate court has decided how the statute applies in person. The cautious course there is to get everyone's consent.

Is it legal to record a phone call in Missouri?

Yes. You can record any phone call you are a party to under Missouri law. This includes landline calls, cell phone calls, and VoIP calls. You do not need to notify the other person on the call.

What are the penalties for illegal audio recording in Missouri?

Illegal wiretapping is a Class E felony under Mo. Rev. Stat. Section 542.402, punishable by up to 4 years in prison and a fine of up to $10,000. Victims whose phone call or other wire communication was illegally intercepted can also sue for at least $10,000 in liquidated damages plus punitive damages and attorney fees.

Can I record a conversation between two other people in Missouri?

Not without consent from at least one of them. Intercepting a phone call you are not part of, without a participant's consent, is a Class E felony. For in-person conversations, Missouri's statute reaches only interception with a device that transmits by radio or interferes with a transmission, but federal law (18 U.S.C. 2511) can still apply, so do not record other people's private conversations.

Does Missouri law apply if I call someone in a two-party consent state?

When you call someone in a two-party consent state like Illinois or California, courts have not settled which state's law governs, and the stricter law may apply. You should obtain consent from all parties before recording interstate calls to two-party consent states, even though Missouri only requires one-party consent.

Updates

Clarified that courts have not settled which state's law governs a call between Missouri and an all-party consent state.

We corrected statements that Missouri lets a participant record any conversation: the one-party exception covers phone calls and other wire communications, in-person recording is unsettled, and the $10,000 civil floor applies only to wire communications; we also corrected the filing deadline (three years may apply), the rule that excludes illegal recordings from court (section 542.420), and our description of the Reporters Committee's position.

Independently fact-checked against the cited primary sources; governing law re-checked for recent changes

Corrected our description of Missouri's wiretap statute: the definition of intercept, the civil cause of action, and the disclose/use offenses cover wire communications, and oral communications are covered only when intercepted with a device that transmits by radio or interferes with transmission.

Corrected two mis-cited statute subsections in the in-person-conversation legal analysis (the participant consent exception is 542.402.2(3), not 2(1)), added the actual radio-transmission qualifier from 542.402.1(2), and pinpointed the good-faith defense to its actual source, 542.418(3).

Independently fact-checked against the cited primary sources; governing law re-checked for recent changes

Governing law re-checked for recent changes

Reviewed and approved by an editor

Sources and References

  1. Mo. Rev. Stat. Section 542.402 - Penalty for Illegal Wiretapping(revisor.mo.gov).gov
  2. Mo. Rev. Stat. Section 542.400 - Definitions(revisor.mo.gov).gov
  3. Mo. Rev. Stat. Section 542.418 - Civil Remedies(revisor.mo.gov).gov
  4. Mo. Rev. Stat. Section 542.408 - Law Enforcement Authorization(revisor.mo.gov).gov
  5. Mo. Rev. Stat. Section 558.011 - Imprisonment Terms(revisor.mo.gov).gov
  6. Mo. Rev. Stat. Section 558.002 - Fines for Felonies(revisor.mo.gov).gov
  7. Mo. Rev. Stat. Section 516.120 - Statute of Limitations(revisor.mo.gov).gov
  8. 18 U.S.C. Section 2511 - Federal Wiretap Act(law.cornell.edu)
  9. National Labor Relations Act(nlrb.gov).gov
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