Cal. Civ. Code § 534.170
Amendments permitted and new parties added, when
Operative Text
Any judge may, in open court and at any time, in furtherance of justice and on such terms as may be proper, on motion of either party, allow any complaint, summons, writ or other proceeding to be amended and permit new parties as coplaintiffs or codefendants to be added and correct a mistake in the name of either party.
Missouri Revised Statutes § 534.170 establishes that in landlord-tenant court proceedings, a judge has broad authority to allow amendments to complaints, summonses, writs, or other court documents at any point during open court proceedings. The rule also permits new parties to be added as co-plaintiffs or co-defendants, and allows corrections to mistakes in party names. These amendments may be granted on the motion of either party, provided the judge finds the change serves the interests of justice and attaches appropriate conditions.
Plain English — not legal advice.
Under Mo. Rev. Stat. § 534.170, landlords involved in eviction or other landlord-tenant proceedings should be aware that court documents are not necessarily final as filed. A compliant and prepared property owner or manager typically ensures that all named parties and document details are accurate from the outset, while understanding that either side may seek amendments during the proceeding. Keeping thorough records of all parties with an interest in the property can help operators respond effectively if a motion to add or correct parties arises.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Mo. Rev. Stat. § 534.170 gives tenants the right to seek amendments to court filings or corrections to name errors during an open court proceeding, and either party may bring such a motion before the judge. If a tenant believes a complaint contains an error in their name or that an important party has been left out of the case, this provision provides a recognized avenue to raise that issue in court. Tenants facing such situations may benefit from consulting a tenant-rights organization or legal aid provider familiar with Missouri landlord-tenant procedure.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 14, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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