Missouri recording law is really two bodies of law wearing one camera system: video, governed by a privacy statute that turns on where a person can reasonably expect to be unobserved, and audio, governed by a wiretap statute with felony penalties attached. Businesses that treat them as one question get the video part right and the audio part expensively wrong. One disclaimer up front, repeated on purpose throughout: we install camera systems, we are not your law firm, and this guide is orientation, not legal advice.
Silent video of common areas, entries, sales floors, warehouses, and parking lots is generally lawful in Missouri. Filming a person without consent where they may be undressed and reasonably expect privacy, with restrooms, locker rooms, and changing areas the classic examples, is a crime under Mo. Rev. Stat. 565.252. Audio is the trap: Missouri is one-party consent under 542.402, unlawful interception is a Class E felony with civil liability under 542.418. The conservative practice: leave camera microphones off unless you have specific legal advice.
Where can a business legally point a camera?
Almost anywhere people do not reasonably expect privacy. Common areas, building entries, sales floors, warehouses, and parking lots are generally lawful to record, which covers the placements a commercial camera system actually needs. The hard line is Mo. Rev. Stat. 565.252, which makes it a crime to knowingly film or photograph a person without consent while they are in a state of full or partial nudity in a place where they reasonably expect privacy: restrooms, locker rooms, and changing areas being the textbook examples. There is no business justification that moves that line. And the analysis follows the space, not the property line: a camera you own, mounted on a wall you own, can still commit the offense if its field of view reaches into a place where privacy is reasonably expected. When we lay out coverage for a client, the privacy zones get drawn first and the camera positions second, including sight lines that merely catch a changing-area doorway at the wrong angle.
Why is audio the trap?
Because the penalties change character. Missouri is a one-party consent state for intercepted wire communications under 542.402: at least one party to the conversation must consent to the recording. Unlawful interception is a Class E felony, up to four years plus fines, and 542.418 adds civil liability of the greater of $100 per day or $10,000 minimum. A surveillance camera recording audio of other people's conversations is a recording to which no party consented, which is exactly the legally risky configuration. And the statute's coverage of in-person, non-wire conversations is unsettled, so anyone promising you a clean answer is selling confidence they do not have.
Our conservative practice, and the default on systems we install: microphones off unless your attorney has signed off on a specific use, and posted notice wherever audio is live. If the goal is knowing what happened rather than hearing it, modern video analytics answer most of those questions without touching a microphone.
Can you record your employees?
Video monitoring of work areas is generally lawful, the same expectation-of-privacy analysis applies, and break areas deserve more care than loading docks. The wrinkle is policy, not placement: blanket no-recording rules aimed at employees face NLRB scrutiny after the 2023 Stericycle decision, which tightened review of workplace rules that could chill protected activity. Camera placement is our lane; an employee monitoring policy and handbook language are your employment lawyer's. Bring both to the table before the system goes live, because retrofitting policy after a dispute is the expensive order of operations. The cheap insurance is disclosure: put monitoring in the handbook, say where cameras are and are not, and say whether audio exists anywhere on the property. In our experience, surprises generate complaints; cameras mostly do not.
Do you have to post camera signs?
For silent video in public-facing areas, Missouri does not strictly require signage. We recommend posting anyway, for two practical reasons: notice strengthens consent arguments if recording is ever challenged, and a visible sign deters some portion of the behavior you bought cameras to catch. If any audio is enabled anywhere, posting notice stops being optional in our book and becomes part of the legal cover your attorney will want. Signs are cheap; arguments about implied consent are not.
How long do you have to keep footage?
No Missouri statute sets a general retention period for commercial surveillance video. Customary practice runs 30–90 days, driven by storage capacity more than law, and the sizing math behind that window is covered in our cloud versus onsite recording guide. The exception that overrides everything: a litigation hold. Once you know footage may be evidence in a dispute, deleting it on schedule stops being routine housekeeping and starts being spoliation. Pick a retention window, document it, follow it consistently, and have a written procedure for preserving footage the moment a claim surfaces. One habit worth building alongside it: when an incident happens, export the clip that day and store it outside the recorder, because a 30-day loop does not care that the insurance claim takes 60.
Frequently Asked Questions
It is risky. Missouri's one-party consent rule under 542.402 requires that a party to the conversation consent, and a camera capturing strangers' conversations has no consenting party. Violations reach felony and civil liability territory, and the law on in-person conversations is unsettled. Leave microphones off unless your attorney approves a specific use.
Not strictly, for silent video in public-facing areas. We still recommend it: posted notice strengthens consent arguments, deters some incidents outright, and becomes genuinely important if any audio recording is enabled anywhere on the property.
Video-only cameras in shared work and common areas are generally lawful; restrooms, locker rooms, and changing areas are criminal territory under 565.252, no exceptions. Employee monitoring also has a policy dimension, especially after the NLRB's 2023 Stericycle decision, so pair placement decisions with employment counsel.
Missouri sets no general commercial requirement. Most businesses keep 30 to 90 days, sized by storage budget. Document your window, apply it consistently, and suspend deletion immediately under a litigation hold, because destroying footage you knew was evidence is the one retention mistake that cannot be fixed.