Sued by a debt buyer in Missouri

The extra rules for debt buyer suits, and how to use them in your answer.

Checked against official sources: Oct 24, 2026.

Short answer

A debt buyer is a company that bought an old debt and now sues to collect it. Missouri has no special court rule for debt buyer lawsuits. In associate circuit cases, the plaintiff's written petition should attach a copy of any written instrument or account that supports the claim.

Time limit to sue (written contract)
10 years
Time to answer
30 days

What a debt buyer must show in Missouri

  • Missouri has no special court rule for debt buyer lawsuits.
  • In associate circuit cases, the plaintiff's written petition should attach a copy of any written instrument or account that supports the claim.

Law: RSMo § 517.031.1

Defenses you can raise in Missouri

In associate circuit cases, all statements in the petition are treated as denied even if you file nothing, but affirmative defenses, such as the statute of limitations, must be filed in writing by the return date. The limit is 10 years for an action on a writing promising to pay money and 5 years for other contracts.

Law: RSMo § 517.031.2; RSMo §§ 516.110(1), 516.120(1)

Old debts in Missouri

In Missouri, the time limit to sue on a written contract is 10 years. A debt older than that can be a defense, but you must raise it in your answer.

A debt collector must not sue you, or threaten to sue you, on a debt that is too old to sue on.

Law: 12 CFR 1006.26(b)

More on old debts at Debt Collector Map

In nearby states

Steps against a debt buyer suit in Missouri

  1. Find the plaintiff

    If the name on the summons is not a company you know, it may be a debt buyer.

  2. Make them prove it

    Use a documents request letter to see what they can prove.

  3. File your answer

    Missouri's deadline: Associate circuit case (most debt cases): be in court on the return date and time on your summons.

  4. Raise every defense

    Point out any missing proof of ownership or amount.

Federal rules in every state

  • Where a collector must sue. A debt collector that sues you over a consumer debt must file where you signed the contract or where you live when the suit starts. Law: 15 U.S.C. 1692i(a)(2)
  • If the collector broke the law. You can sue a debt collector that broke the federal debt collection law within 1 year, for your losses, up to $1,000 more and your lawyer's fees. Law: 15 U.S.C. 1692k

Free help in Missouri

Questions about debt buyer suits in Missouri

What does Missouri require of debt buyers who sue?

Missouri has no special court rule for debt buyer lawsuits. In associate circuit cases, the plaintiff's written petition should attach a copy of any written instrument or account that supports the claim.

How many days do I get to answer in Missouri?

Associate circuit case (most debt cases): be in court on the return date and time on your summons. You do not have to file a written answer, but any affirmative defenses (such as the statute of limitations) or counterclaims must be filed in writing by that return date and time, unless the court allows later filing. Circuit judge case: file a written answer within 30 days after you are served (or within 30 days after the mail receipt or acknowledgment is filed, if you were served by mail).

How old is too old for a debt buyer suit in Missouri?

In Missouri, the time limit to sue on a written contract is 10 years. A debt older than that can be a defense, but you must raise it in your answer.

More for Missouri

Sources

Sources

Last checked: Oct 24, 2026.

Federal sources