Missouri Small Claims Court Rules of Evidence

Evidence Rules Are Relaxed — But They Still Exist

Formal rules of evidence do not apply in Missouri small claims proceedings. Supreme Court Rules 140 through 152 govern procedure, and Rule 140.05 fills gaps with Associate Circuit Court practice. The judge decides what to consider and how much weight to give it.

Relevant, well-organized evidence helps the judge understand your claim.

What Counts as Evidence

Missouri small claims judges consider four categories of evidence:

Documentary evidence — contracts, invoices, receipts, bank statements, emails, text messages, letters, repair estimates, medical bills. This is typically the strongest evidence because it exists independent of either party's memory. Print everything out — don't plan to show things on your phone screen.

Photographic and video evidence — timestamped photos of property damage, injury photos, video of an incident. Print photos in color on standard paper. If you have video, bring it on a device the judge can view, but also bring still frames printed as backup.

Testimonial evidence — your own sworn testimony and the testimony of any witnesses you bring. In small claims court, both parties testify under oath. The judge weighs your credibility based on consistency, specificity, and whether your testimony matches the documentary evidence.

Physical evidence — the damaged item itself, if it's portable. A stained jacket, a broken part, a cracked phone screen. Judges appreciate seeing the actual damage rather than relying on descriptions.

The Three-Copy Rule

Bring three copies of every document and photo: one for the judge, one for the defendant (or their attorney), and one for yourself. Judges in Missouri small claims proceedings routinely expect organized paper copies. If you arrive with a single folder of originals, the judge has to pass papers back and forth — it slows the hearing and makes you look unprepared.

Organize your copies in chronological order with a simple index on top: "Exhibit 1: Contract dated March 5, Exhibit 2: Invoice dated March 20," and so on. Tab or clip each exhibit separately.

What Judges Actually Care About

Missouri small claims judges see dozens of cases in a session. They're looking for:

• A clear timeline — what happened, in what order, with dates
• Dollar amounts tied to documents — "I paid $1,200" supported by a bank statement or receipt, not just your word
• A demand and refusal — evidence that you tried to resolve the dispute before filing, especially a demand letter sent by certified mail
• Proportionality — the damages you claim should match the evidence you present. Claiming $5,000 in damages with $800 in repair estimates will get you $800, not $5,000.

Common Evidence Mistakes

Relying on text messages shown on a phone. Print them out. A printed screenshot can help support your account; the judge decides whether and how much weight to give it. A phone you're scrolling through while the judge waits is not effective.

Bringing originals without copies. The judge can't keep your only copy, and the defendant has a right to see what you're presenting. Three copies, always.

Relying only on secondhand information. "My friend told me the contractor is known for this" may carry less weight than testimony from a witness with firsthand knowledge. Because formal evidence rules do not apply, secondhand statements are not automatically excluded; the judge decides what to consider and how much weight it deserves.

Overloading with irrelevant material. A hundred pages of email correspondence when only five are relevant buries your case. Edit your evidence package to the documents that directly support your claim and timeline.

Forgetting the math. Bring a simple written breakdown of your damages: the principal amount owed, interest if applicable, court costs. Make it easy for the judge to see exactly how you arrive at the number on your petition.

Subpoenas for Reluctant Witnesses

If a witness won't come voluntarily, you can subpoena them. File a request with the clerk — the cited St. Louis County schedule lists a $26 fee per witness subpoena, so confirm the current charge with your clerk. The witness must be served the subpoena before the hearing date. More on this in our post on Missouri small claims witness subpoenas.

Presenting Your Case

When the judge calls your case, you'll stand, take an oath, and present your side first (as the plaintiff). A structure that works:

1. State your claim in one or two sentences: "I'm suing the defendant for $2,400 in unpaid invoices for landscaping work I completed in April."
2. Walk through the facts chronologically, referring to your exhibits by number.
3. Hand the judge their copy of the exhibit binder.
4. When finished, stop talking. Don't repeat yourself or editorialize.

The defendant then presents their side. You may get a brief chance to respond. The judge may ask questions of either party.

Build Your Evidence Package

Our Missouri small claims filing guide includes an evidence index and hearing binder organizer that walks you through assembling your three exhibit sets, building a timeline, and calculating your damages — so you walk into the hearing with everything the judge needs to rule in your favor.

See more Missouri guides →