Know your rights · Missouri

Is door-to-door soliciting legal in Missouri?

Short answer: yes — courts won't let cities ban knocking outright. But “legal” is doing less work than solicitors would like you to think. Missouri law makes pressure sales cancelable, cities set their own permit and hours rules, and once you say “leave,” the law is on your side. Here's the whole picture, with citations.

The quick version

Soliciting is legal but regulated — mostly by your city, not the state.
Anything you signed at your door can usually be canceled within 3 business days (state and/or federal law).
A solicitor who stays after you say “leave” is trespassing — anywhere in Missouri.
What a posted sign means varies by city: solid — Kansas City bars soliciting at a posted “No Solicitation” sign (even a handwritten one) and § 569.140 makes posted or fenced property off-limits as first-degree trespass, though permit rules vary widely by city.

What Missouri state law gives you

RSMo §§ 407.700–407.720

Three business days to cancel a doorstep sale

Missouri’s home-solicitation sales law lets you cancel until midnight of the third business day (Saturdays, Sundays, and holidays don’t count) by written notice; if mailed, it counts when postmarked. The seller must present a written agreement stating your cancellation rights for the deal to stick.

The federal FTC Cooling-Off Rule adds the same three-day right for most in-home sales over $25. Either way, a contract signed under pressure at the door isn’t final that day.

RSMo § 569.140

Posted or fenced property is off-limits

First-degree trespass in Missouri covers knowingly entering or remaining unlawfully on real property that is fenced or enclosed to exclude intruders, or posted with notice against trespass. A posted sign serves as that notice, and Missouri also recognizes the purple-paint marking method. It’s a Class B misdemeanor.

A direct “please leave” always works too. Once given, a canvasser who stays has crossed into trespass.

Municipal ordinances

Permits vary wildly — some cities require none

Missouri leaves solicitor rules to cities, and the spread is dramatic: some require a permit and background check, while Kansas City has no permit process at all and instead enforces your posted sign. Your city’s code is what decides whether the canvasser needed a license — and how to report one who ignores your sign.

Your city sets the door-knocking rules

Missouri's largest cities regulate solicitors in different ways — a good preview of how much this varies town to town. If yours isn't here, search “[your city] solicitor permit.”

No permit — but a posted sign is enforceable

Kansas City

Kansas City doesn’t license door-to-door solicitors, but Ordinance 50-172 makes it unlawful to solicit at any home displaying a “No Solicitation” or “No Solicitors” sign at the front door — even a handwritten one taped to the door counts. Post it, and you can call the non-emergency police line to have a violator cited.

A handwritten sign that police will enforce is a powerful, free “no” — but it only works if the solicitor bothers to look. A registry answers before they walk up.

Peddler/solicitor permit + background check

University City

University City (St. Louis area) requires peddlers and solicitors to obtain a permit with a background check and supporting documentation before going door-to-door — a stricter regime than Kansas City’s, and a reminder that Missouri’s rules change city to city.

Individual, non-transferable permit worn visibly

Lake Saint Louis

Lake Saint Louis issues individual, non-transferable Peddler/Solicitor/Canvasser permits that each person must carry, wear visibly on their outer clothing, and present on request. It’s among the more identification-focused solicitor ordinances in the state.

What a “No Soliciting” sign does — and where it falls short

Post one. Where the local code gives it legal force it turns some canvassers away, and everywhere it establishes that a knock wasn't welcome. But the patchwork above exposes the sign's two structural weaknesses: the rules protecting you differ block by block, and a sign creates no record of who ignored it. Enforcement is almost always complaint-driven — and a complaint is only as strong as your ability to say who knocked, and when.

Where NoKnock fits

Make the sign checkable — and the ignoring of it a record

A do-not-knock list a company can actually be held to is the stronger model. NoKnock is that idea for any address in the country — you register free, put a QR decal at your door, and canvassing organizations that subscribe get a “Do Not Knock” answer for your home before anyone walks up. If someone knocks anyway, logging it takes seconds, so the fourth violation reads as a pattern, not four bad afternoons.

Honest caveat: the registry is young, and not every canvasser checks it yet. The decal works on day one regardless — and it's the only option on this page that turns an ignored “no” into a timestamped record.

Religious and political canvassers play by different rules

In Watchtower v. Village of Stratton (2002), the U.S. Supreme Court held that a town can't require a permit for religious, political, or other noncommercial door-to-door canvassing. That's why city permit schemes carve those groups out, and why a “permit, please” challenge only works on commercial sellers.

What survives for noncommercial visitors: the trespass baseline (they must leave when asked) and, in some cities, posted-sign rules that apply to everyone. If you want maximum legal coverage from a sign alone, “No Trespassing” generally sweeps broader than “No Soliciting.”

Common questions

Is door-to-door soliciting legal in Missouri?

Yes, and permit rules vary a lot by city — University City and Lake Saint Louis require permits and background checks, while Kansas City has no permit process at all. Kansas City instead enforces posted "No Solicitation" signs by ordinance, and state law lets you cancel most doorstep sales within three business days.

Is ignoring a No Soliciting sign illegal in Missouri?

It can be. In Kansas City, Ordinance 50-172 makes it unlawful to solicit at a home posting a "No Solicitation" or "No Solicitors" sign — even a handwritten one — and police can cite violators. Statewide, RSMo § 569.140 makes entering posted or fenced property first-degree trespass, a Class B misdemeanor, and a spoken request to leave counts as notice.

Can I cancel a contract signed with a door-to-door salesperson in Missouri?

Usually yes. Missouri’s home-solicitation sales law (RSMo §§ 407.700–407.720) gives you until midnight of the third business day to cancel in writing, and the seller must present a written agreement stating that right. The federal FTC Cooling-Off Rule provides the same three-day protection for most in-home sales over $25.

Do door-to-door solicitors need a permit in Missouri?

It depends entirely on the city. Many Missouri municipalities — University City and Lake Saint Louis among them — require a permit and background check, while Kansas City requires none. Where a permit is required, a legitimate solicitor should be able to show it; where it isn’t, your posted sign and the state trespass statute are your tools.

Sources

This page is general information, not legal advice, and state statutes and city ordinances change — always verify against the current code before relying on a specific provision. Last reviewed July 2026.

The law backs you up. Make it easy to invoke.

Register your address, put the decal by the door, and every rule on this page gets a record to point at. Free, under a minute.

Want the practical playbook too? How to stop door-to-door salesmen