Missouri Revised Statutes

Mo. Rev. Stat. § 527.110 (2026)

Parties

✓ current as of May 2026
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  527.110.  Parties. — When declaratory relief is sought, all persons shall be made parties who have or claim any interest which would be affected by the declaration, and no declaration shall prejudice the rights of persons not parties to the proceedings.  In any proceeding which involves the validity of a municipal ordinance or franchise, such municipality shall be made a party, and shall be entitled to be heard, and if the statute, ordinance or franchise is alleged to be unconstitutional, the attorney general of the state shall also be served with a copy of the proceeding and be entitled to be heard.

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(RSMo 1939 § 1136)

(1978) Held, that city of Lake Ozark was not an interested party in action under Sawyer Act when it intervened in annexation proceeding brought by city of Osage Beach, even though Lake Ozark was attempting to annex the same land.  No question concerning validity of Lake Ozark annexation was raised. State ex rel. City of Lake Ozark v. City of Osage Beach (A.), 568 S.W.2d 539.

Notes of Decisions
Cited in 50 cases (4 in the last 5 years), 1951–2025 · leading case: Schaefer v. Koster, 342 S.W.3d 299 (Mo. 2011).
Schaefer v. Koster, 342 S.W.3d 299 (Mo. 2011). · cites it 4× “" Section 527.110. Additionally, the Attorney General represents the State of Missouri on the appeal of felony convictions.”
Betty G. Weldon Revocable Trust Ex Rel. Vivion v. Weldon, 231 S.W.3d 158 (Mo. Ct. App. 2007). · cites it 3× “04 and section 527.110, RSMo 2000, provide, “When declaratory relief is sought, all persons shall be made parties who have or claim any interest which would be affected by the declaration, and no declaration shall prejudice the rights of persons not parties to the proceedings.”
Midwest Freedom Coalition, LLC v. Koster, 398 S.W.3d 23 (Mo. Ct. App. 2013). · cites it 10× “” § 527.110; 1 see also Rule 84.07. Section 527.”
Bauer v. Bd. of Election Commissioners, 198 S.W.3d 161 (Mo. Ct. App. 2006). · cites it 8× “04 provide, in pertinent part, that “[w]hen declaratory relief is sought, all persons shall be made parties who have or claim any interest which would be affected by the declaration, and no declaration shall prejudice the rights of persons not parties to the proceedings.”
Mahoney v. Doerhoff Surgical Servs., Inc., 807 S.W.2d 503 (Mo. 1991). · cites it 2× “04 rescripts § 527.110, RSMo 1986. The entirety of Rule 87 and Chapter 527, of which Rule 87.”
Durwood v. Dubinsky, 291 S.W.2d 909 (Mo. 1956). · cites it 8× “Section 527.110 (all statutory references are to RSMo 1949, V.”
Harris v. Union Elec. Co., 622 S.W.2d 239 (Mo. Ct. App. 1981). · cites it 3× “UE cites § 527.110, RSMo 1978: “When declaratory relief is sought, all persons shall be made parties who have or claim any interest which would be affected by the declaration, and no declaration shall prejudice the rights of persons not parties to the proceedings.”
Evans v. Empire Dist. Elec. Co., 346 S.W.3d 313 (Mo. Ct. App. 2011). · cites it 2× “In Point Two, the Appellants argue the trial court abused its discretion in granting the PSC’s motion to dismiss because the PSC is an interested party required to be joined under section 527.110, in that Proposition C gives the PSC authority to enforce its provisions through…”
S____ v. W____, 514 S.W.2d 848 (Mo. Ct. App. 1974). · cites it 6× “The defendant's second point on this appeal is that the plaintiffs' petition does not set forth facts sufficient to entitle them to relief under the Declaratory Judgment Act by failing to allege the existence of a justiciable controversy and by not including interested parties…”
Empire Dist. Elec. Co. v. Coverdell, 484 S.W.3d 1 (Mo. Ct. App. 2015). · cites it 2× “Of these authorities, only the former version of Rule 55.”
Jones v. Jones, 285 S.W.3d 356 (Mo. Ct. App. 2009). · cites it 2× “” 5 Section 527.110 states that “[w]hen declaratory relief is sought, all *360 persons shall be made parties who have or claim any interest which would be affected by the declaration, and no declaration shall prejudice the rights of persons not parties to the proceedings.”
Dye v. Div. of Child Support Enf't, Dep't of Soc. Servs., 811 S.W.2d 355 (Mo. 1991). · cites it 2× “Such notice is a specific requirement only in the declaratory judgment statutes, § 527.110, RSMo 1986 and Missouri Rule of Civil Procedure 87.”
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