Is It Legal to Record a Conversation in Missouri?

Statute · Penalty: mixed

Mo. Rev. Stat. §§ 542.400–542.422 (wiretapping/eavesdropping), particularly § 542.402 (penalty and permitted activities) and § 542.400 (definitions); related civil-action provision at § 542.418; separate video-voyeurism statute at § 565.252 (invasion of privacy).

In-person vs. phone & video calls

Missouri's statute treats "wire communication" (phone/electronic) and "oral communication" (in-person) differently and asymmetrically (verbatim text confirmed on revisor.mo.gov). § 542.402.1(1) flatly criminalizes intercepting any "wire communication" as a class E felony, and § 542.402.2(3) gives private citizens (persons "not acting under law") a clear one-party-consent exception for WIRE communications only ("a person not acting under law to intercept 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"). By contrast, § 542.402.1(2) criminalizes using a device to intercept an "oral communication" ONLY "when such device transmits communications by radio or interferes with the transmission of such communication" — i.e., the oral-communication offense is narrowly limited to radio-transmitting/interfering devices (classic "bugging"), not ordinary local-storage recorders. There is no separate statutory one-party-consent exception written for private citizens recording oral communications (§ 542.402.2(2)'s one-party-consent language for oral communications is limited to persons "acting under law," i.e., law enforcement). Practical effect widely reported by secondary sources (DMLP, RCFP, recordinglaw.com) and consistent with the statutory text verified directly: a standard non-radio-transmitting wearable audio/video recorder used by a private citizen to capture an in-person conversation likely falls outside § 542.402.1(2)'s prohibition altogether, meaning ordinary secret in-person recording is not clearly criminalized by this statute regardless of consent — this is why Missouri is conventionally listed as a "one-party consent" state, but the statutory basis for oral (in-person) recording is narrower/more idiosyncratic than for wire/electronic communications, and no Missouri appellate decision was found that squarely resolves how far the wire-communication one-party-consent exception extends to oral communications captured by ordinary (non-radio) recorders.

Recording in public

The gating concept is built into the statutory definition of "oral communication" itself (§ 542.400): it is defined as "any communication uttered by a person exhibiting an expectation that such communication is not subject to interception under circumstances justifying such expectation." Note: a prior version of this analysis cited "Angel v. Williams, 12 F.3d 786 (8th Cir. 1993)" as controlling authority for this proposition. That citation could not be independently corroborated across CourtListener, Justia, Casetext, Leagle, OpenJurist, case.law, AnyLaw, CaseMine, FindLaw, and other sources, and should be treated as unconfirmed/potentially fabricated until verified via an authenticated service (Westlaw/Lexis/Fastcase). Absent that case, this is an untested, lower-confidence inference from the bare statutory text alone: conversations/interactions occurring in public places (streets, public disputes, on-duty police encounters) where there is no reasonable expectation of privacy likely fall outside the statute's protection entirely, meaning recording them (audio or video) is not restricted by §§ 542.400–.422 regardless of consent. This is a reasoned extension from the bare statutory definition with no confirmed on-point case law, hence low confidence on how far it extends until the citation above is resolved.

Recording at home

No statutory carve-out making home recording either more permissive or stricter than recording elsewhere was found. Notably, § 542.400's definition of "intercept" expressly states aural acquisition includes but is not limited to "interception by one spouse of another spouse" — i.e., the legislature specifically closed off any implied spousal/domestic exemption, confirming Missouri (unlike some states) applies its wiretap consent rules fully within the home/between spouses, with no lesser protection there. Secondary sources reference a Missouri appellate case involving a spouse using a scanner to intercept the other spouse's cellular calls, held illegal under the wiretap law, consistent with this reading, but the primary citation/text for that specific case was not independently verified, so that specific example is lower confidence.

Recording the police

Missouri is within the Eighth Circuit (U.S. Court of Appeals for the Eighth Circuit), which is a notable outlier nationally: it has NOT recognized a clearly established First Amendment right to actively record on-duty police in public for qualified-immunity purposes, even though it has recognized a right to passively observe. Key primary sources (fetched/cross-checked directly): (1) Chestnut v. Wallace, 947 F.3d 1085 (8th Cir. 2020) — held that a person has a clearly established right to passively observe/watch police-citizen interactions from a distance without interfering, denying qualified immunity to an officer who detained a bystander merely watching a traffic stop; the panel noted "every circuit court to have considered the question has held that a person has the right to record police activity in public." (2) Molina v. City of St. Louis (Molina v. Book), 59 F.4th 334 (8th Cir. 2023), cert. denied 2024 — a panel held that even assuming the First Amendment protects observing AND RECORDING police conduct, that right was not "clearly established" in the Eighth Circuit as of 2015, so officers who tear-gassed legal observers filming a protest response retained qualified immunity. Net effect: unlike most other federal circuits, there is currently no clearly-established Eighth Circuit precedent guaranteeing a right to actively film police in Missouri for qualified-immunity purposes, which matters for civil-rights liability even though the underlying constitutional question remains technically open. On the statutory side, § 542.402.1(2)'s law-enforcement/undercover-microphone proviso and the one-party-consent exceptions in § 542.402.2(2)-(3) do not create any special restriction on citizens recording police; the general framework and the public-place reasonable-expectation gate (Angel v. Williams) apply the same way to police encounters as to any other public interaction — recording an on-duty officer in a public place is not independently criminalized by Missouri's wiretap statute, but the confrontation context could still expose a recorder to unrelated charges (e.g., interference/obstruction statutes) outside the scope of this wiretap analysis.

Video-only capture (no audio)

Not restricted by this statute. § 542.400 defines "intercept" as "the aural acquisition of the contents of any wire communication through the use of any electronic or mechanical device" — interception under Missouri's wiretap law is expressly tied to AURAL (audio) acquisition. A silent video-only recording with no audio component does not constitute an "interception" of a "wire" or "oral" communication under this chapter and falls outside § 542.402 entirely. Separately, Missouri's invasion-of-privacy statute, § 565.252, criminalizes photographing/filming another person's nudity or under clothing without consent in a place where there is a reasonable expectation of privacy (class A misdemeanor, elevated to class E felony for distribution, multiple victims, or repeat offense) — this is a narrow voyeurism statute, not a general video-recording-consent law, and would not apply to filming a public dispute, interpersonal confrontation, or a police interaction where no nudity is involved.

What counts as a “private” conversation →

Missouri's privacy gate lives in the statutory definition of "oral communication" at Mo. Rev. Stat. § 542.400(8): "any communication uttered by a person exhibiting an expectation that such communication is not subject to interception under circumstances justifying such expectation." (Verbatim — independently re-fetched today directly from revisor.mo.gov and confirmed to match exactly.) This is a two-part subjective-expectation-plus-objective-reasonableness test, structurally similar to the Katz reasonable-expectation-of-privacy standard. By contrast, "wire communication" is defined purely by mode of transmission — "any communication made in whole or in part through the use of facilities for the transmission of communications by the aid of wire, cable, or other like connection between the point of origin and the point of reception" (also verbatim-confirmed) — with no privacy-expectation qualifier at all, so the gate applies only to in-person/oral communications, never to phone/wire communications. A second, independent gate is layered on top for oral communications only: § 542.402.1(2) criminalizes using a device to intercept an oral communication only "when such device transmits communications by radio or interferes with the transmission of such communication" (verbatim-confirmed) — so even an oral communication that clears the privacy-expectation gate falls outside the criminal offense unless captured by a radio-transmitting/bugging device, not an ordinary local-storage recorder. CRITICAL CORRECTION: The case law the submitted analysis relies on to show how § 542.400(8)'s gate applies in practice — "Angel v. Williams, 12 F.3d 786 (8th Cir. 1993)" — could NOT be independently verified as a real case despite an extensive, good-faith search (30+ distinct attempts across CourtListener, Justia, Casetext, Leagle, OpenJurist, the Caselaw Access Project/case.law, AnyLaw, CaseMine, FindLaw, vLex, Bing, Google Scholar, DuckDuckGo, Mojeek, Marginalia Search, and the Internet Archive Wayback Machine). Every attempt returned either no result, a 403/404, or — most tellingly — zero search-engine hits at all for the exact citation string "12 F.3d 786" in connection with any legal subject matter (Bing returned only numerology/dictionary results). A genuinely published 1993 F.3d opinion would almost always be indexed somewhere (CourtListener has near-complete free F.3d coverage from that era, and case-database stub pages are normally SEO-indexed on Bing/Google even when full text is paywalled). Getting zero corroboration anywhere is a materially stronger red flag than an access/paywall block, and this citation should be treated as unconfirmed — not asserted as verified controlling authority — until someone with Westlaw/Lexis/Fastcase access checks it. Note also that the existing live dataset row's own verification notes claim the opinion was "independently retrieved (law.resource.org)," but that exact URL 404s today and has no Wayback Machine snapshot either, so that prior claim of confirmation is itself suspect. Recommend either removing the case citation from the live row or clearly labeling it "unverified — pending confirmation via authenticated legal database" rather than presenting it as settled precedent. Absent a confirmed case, no case law verifiably establishes how § 542.400(8)'s expectation-of-privacy test applies to any specific fact pattern (jail/institutional, public street, etc.) — the gate's real-world scope beyond its plain statutory text is currently unconfirmed by any source I could independently verify. Missouri's one-party consent rule and its privacy gate run on separate tracks that converge only for oral (in-person) communications — consistent with, and correctly reflected by, the existing row's "one_party" consent_type classification. For wire/electronic communications there is no privacy gate at all: § 542.402.2(3) gives any private citizen who is a party to (or has one party's consent to) a wire communication an unconditional right to record it, regardless of anyone's expectation of privacy (verbatim-confirmed against revisor.mo.gov). For oral communications, a conversation must first qualify as "oral communication" under § 542.400(8)'s expectation-of-privacy-justified-by-circumstances test — a gate that, on re-verification, has no case law I could confirm actually construing it in any specific fact pattern, so its real-world reach (e.g., in institutional or public-street settings) should be treated as unconfirmed rather than settled by precedent. Independently of that gate, § 542.402.1(2)'s oral-communication offense is itself limited to devices that transmit by radio or interfere with transmission, and § 542.402.2(3)'s private-citizen one-party-consent exception is drafted to cover only "wire communication," with no oral-communication counterpart for private citizens (both verbatim-confirmed). The practical result — which rests entirely on the verified statutory text and does NOT depend on the unconfirmed case citation — is that a private citizen using an ordinary non-radio-transmitting wearable recorder to capture an in-person conversation is very likely outside the statute's criminal reach regardless of consent or privacy expectation. This is why Missouri's "one-party consent" label for oral communications is better understood as a description of the practical/conventional outcome (recording is typically unregulated by this statute) rather than a straightforward statutory consent exception like the wire-communication track has. This structural conclusion is sound and verified; only the case-law layer supporting the institutional-setting extension is in question.

Biometric / voiceprint law →

None currently enacted. No dedicated biometric privacy statute applicable to private entities (no BIPA/CUBI/WA-RCW-19.375-style law) and no comprehensive consumer privacy act of any kind. Note: Missouri does have one narrow, government-only biometric statute (Mo. Rev. Stat. § 302.170, restricting the Dept. of Revenue's use of biometric data — including "voice data" — in driver's-license production); it does not reach private companies and is not a general biometric privacy law. Separately, a BIPA-style "Biometric Information Privacy Act" (with a voiceprint-inclusive definition and a private right of action) has been introduced in three consecutive legislative efforts and has died each time: SB554 (2025), HB500 (2025), and HB1970 (2026). — None currently in force under Missouri law for a private company collecting/processing a voiceprint. Missouri has neither (a) an enacted dedicated biometric privacy statute reaching private entities like Illinois BIPA, Texas CUBI, or Washington RCW 19.375, nor (b) a comprehensive consumer data privacy act (VA CDPA / CO CPA / CT CTDPA / CA CCPA-CPRA / UT UCPA type) that would classify biometric data as "sensitive data" and impose an opt-in-consent requirement. Absent such a statute, live.law's voice-enrollment feature is not currently subject to a Missouri-specific written-consent, notice, or retention/destruction-policy mandate. This is an actively contested area, however: identical BIPA-style bills (SB554/HB500 in 2025, HB1970 in 2026) that would impose exactly such a written-notice-plus-written-release regime (with "voiceprint" expressly named in the biometric-identifier definition) have been introduced and died in three consecutive sessions — meaning Missouri lawmakers have repeatedly attempted, and could plausibly pass in a future session, a law that would directly regulate live.law's voice-enrollment feature and attach a private right of action to violations. Recommend flagging Missouri for re-check at the start of every Missouri legislative session (typically convenes January, adjourns mid-May).

Attorney ethics (ABA Formal Op. 01-422) →

Missouri's Advisory Committee of the Supreme Court of Missouri (the body appointed under Mo. Sup. Ct. Rule 5.01 to issue formal ethics opinions interpreting the Missouri Rules of Professional Conduct) squarely addressed this question in Formal Opinion 123 and expressly adopted the ABA's permissive approach, stating verbatim: "The Advisory Committee agrees with the reasoning of ABA Formal Opinion 01–422." The opinion holds that an attorney's secret (undisclosed) recording of a conversation with a nonclient is NOT per se a violation of Rule 4-8.4(c) (Missouri's analog to Model Rule 8.4(c)), superseding the older per-se-unethical view tied to ABA Formal Opinion 337 (1974), which the opinion's own footnotes note was "Withdrawn 2001." The operative holding is stated as: "An attorney may record a conversation, to which the attorney is a party, without notifying the other parties to the conversation, unless other factors are present." That permission is conditioned on three things, each independently verbatim-confirmed against the primary source: (1) Legality — "An attorney may not record a conversation, secretly or otherwise, if the act of recording would be illegal," making the ethical permission contingent on the recording being lawful under Missouri's own one-party-consent wiretap statute (a separate body of law covered elsewhere in this dataset); (2) No independent deceit — "An attorney may not engage in dishonesty, deception, misleading statements, or misrepresentation about whether the attorney is recording the conversation," so affirmatively lying when directly asked would still violate Rule 4-8.4(c); and (3) Current-client carve-out — "If the recording is of a conversation with a current client, the attorney must give some notice to the client that the attorney is, or may be, recording the conversation," a duty the opinion ties to Rule 4-1.4's client-communication requirement and does not extend to nonclients (opposing parties, witnesses, opposing counsel). In short: undisclosed recording of a nonclient conversation is not itself unethical in Missouri, provided it's legal under state law and not accompanied by an independent lie about the fact of recording, but a Missouri lawyer must give some notice to their own current client that recording is happening or may happen.

Can you personally sue over a violation?

Yes — this state gives a private right of action, not just criminal/regulatory enforcement.

Can I record as a guest in someone else's home?

Missouri doesn't lean hard on where you're standing — recording as a guest in someone else's home is treated much like recording anywhere else in the state.

What if I'm on a call with someone in another state?

Play it safe: if either state on the call requires everyone's okay to record, treat the whole call that way — don't assume Missouri's rule is the only one that matters just because you're the one wearing the glasses.

If it's legal to record, can it still be used against me later?

Usually, yes. Being legal to record and being protected from a future court case are two different questions — a legal recording can generally still be obtained by the other side later. That's especially true the moment a third person is present or on the line — even one extra listener can be enough to strip away legal protection here. Recording your own conversation with your own attorney is a separate, more protected situation, but almost everything else — a landlord, a police officer, a family member — isn't automatically off-limits to opposing counsel just because it was legal to capture.