Missouri (MO) · Open house rules

Open house rules for Missouri agents

What Missouri asks of an agent at the door: when the Broker Disclosure Form has to change hands, whether a follow-up text counts as a telephone solicitation, when a written buyer agency agreement is due, and how long the paperwork from the sign-in table is kept.

Last reviewed August 31, 2026Every claim links to a primary source

This is not legal advice

We are software people, not lawyers. This page is a plain reading of public Missouri sources, gathered so you can go read them yourself. Rules change, and how any rule applies to your situation is a question for your broker, your association, or an attorney licensed in Missouri.

When do you have to hand a Missouri visitor the Broker Disclosure Form?

At a Missouri open house on a residential listing you are normally the seller's agent meeting buyers who have not entered into a brokerage relationship with anyone, and the Missouri Real Estate Commission's rule tells you to put your agency alternatives in front of those visitors on the commission's own Broker Disclosure Form. The rule sets a deadline that does not wait for the conversation to get serious. The form is due upon obtaining any personal or financial information, or before the signing of a brokerage service agreement, whichever occurs first. A sign-in asking for a name, a phone number and an email is that kind of personal information on the plain reading of the rule, so keep current copies of the form beside the sign-in and give one to every unrepresented visitor rather than saving it for the people who seem serious.

In any event, a licensee shall provide the party that has not entered into a brokerage relationship as described in section 339.710.5, RSMo, the Broker Disclosure Form upon obtaining any personal or financial information or before the signing of a brokerage service agreement, whichever occurs first.
20 CSR 2250-8.097 Broker Disclosure Form, Missouri Code of State Regulations (opens the source in a new tab)

Checked at the source on August 31, 2026

Can you call or text a Missouri open house visitor afterwards?

Missouri's no-call law runs on the term telephone solicitation, and the definition feeding sections 407.1095 to 407.1110 expressly covers short messaging service (SMS) and multimedia messaging service (MMS), so a follow-up text is treated the same as a voice call. Two of the carve outs are the ones that matter at the door, and both are written around a residential subscriber: a communication sent with that subscriber's prior express invitation or permission, and one from a person or entity the subscriber has had a business contact with in the past one hundred eighty days or has a current business or personal relationship with. The sign-in is where you earn the first of those. Ask the visitor to opt in to being contacted, record that they did and when, and keep that record attached to the lead, because permission you cannot evidence later is not worth much.

any voice, facsimile, short messaging service (SMS), or multimedia messaging service (MMS), for the purpose of encouraging the purchase or rental of, or investment in, property, goods or services, but does not include communications: (a) To any residential subscriber with that subscriber's prior express invitation or permission; (b) By or on behalf of any person or entity with whom a residential subscriber has had a business contact within the past one hundred eighty days or a current business or personal relationship;
Missouri Revised Statutes 407.1095, definitions (opens the source in a new tab)

Checked at the source on August 31, 2026

Do you need a written buyer agreement before showing a Missouri open house visitor around?

Missouri puts the written buyer agency agreement ahead of the work rather than alongside it. Before engaging in any acts enumerated in section 339.010, a designated broker acting as a single agent for a buyer or tenant has to enter into a written agency agreement with that buyer first. Hosting the open house does not by itself trip that, because the statute excepts ministerial acts as defined in section 339.710, and that definition names attending an open house and responding to questions about the property from a consumer, along with setting an appointment to view property. So greeting visitors and answering their questions about the house is fine with nothing signed. The moment the conversation turns into you acting as that buyer's agent, stop and get the written agency agreement in place first.

Before engaging in any acts enumerated in section 339.010, except ministerial acts defined in section 339.710, a designated broker acting as a single agent for a buyer or tenant shall enter into a written agency agreement with the buyer or tenant.
Missouri Revised Statutes 339.780.3 (opens the source in a new tab)

Checked at the source on August 31, 2026

Who holds the paperwork from a Missouri sign-in table, and for how long?

Missouri's records rule is written about transaction records rather than about a lead list, so do not assume an open house sign-in list is automatically covered by it. What the rule does settle is the paperwork from the door that ends up in a transaction file. Every broker has to retain true copies of the records, contracts, brokerage relationship agreements and correspondence relating to each real estate transaction the broker has handled for at least three years, and those records have to be made available for inspection by the commission and its authorized agents during usual business hours at the broker's regular place of business. The signed Broker Disclosure Form you hand a visitor who goes on to make an offer is one of those, so it belongs somewhere your principal broker can actually produce it and not only on your own phone. For the rest of the list, retention and consent pull in opposite directions, so collect only the details you will genuinely use and ask permission to contact the visitor at the same moment you take them.

Every broker shall retain for a period of at least three (3) years true copies of all business books; accounts, including voided checks; records; contracts; brokerage relationship agreements; closing statements and correspondence relating to each real estate transaction that the broker has handled. The records shall be made available for inspection by the commission and its authorized agents at all times during usual business hours at the broker's regular place of business.
20 CSR 2250-8.160 Retention of Records, Missouri Code of State Regulations (opens the source in a new tab)

Checked at the source on August 31, 2026

How this page is put together

  • Every claim above carries a link to a primary source, plus the exact words from that source that support it. If a claim cannot be quoted, it is not on this page.
  • Each claim shows the date a human last opened that link and confirmed the quote still says what it says.
  • We only cover what we could source. A topic you were hoping to find may be one we have not confirmed yet, so treat this as a starting point rather than a complete list of everything Missouri expects of you.

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