Connecticut General Statutes

Conn. Gen. Stat. § 52-109 (2026)

Substituted plaintiff

✓ current as of May 2026
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When any action has been commenced in the name of the wrong person as plaintiff, the court may, if satisfied that it was so commenced through mistake, and that it is necessary for the determination of the real matter in dispute so to do, allow any other person to be substituted or added as plaintiff.

(1949 Rev., S. 7831.)

One who has no right or interest cannot be substituted as plaintiff. 63 C. 460, 472. Substitution is not the commencement or institution of another suit. Id., 477. Cited. 65 C. 115; 72 C. 261. Where conservator brings action in his own name, and ward dies, his administrator may enter. 91 C. 680. Cited. 179 C. 246. Any defect in the standing of plaintiff who commences an action as the conservator of another person who has a colorable claim of injury is cured under section when such conservator becomes the administratrix of such person and is substituted as plaintiff in the present case. 312 C. 1. Addition or substitution of a plaintiff is discretionary, but generally should be allowed when, due to an error, misunderstanding or misconception, an action was commenced in the name of the wrong party, instead of the real party in interest, whose presence is required for a determination of the matter in dispute. 320 C. 535.

Cited. 1 CA 99; 25 CA 751; 31 CA 80; Id., 476; 33 CA 365. Section is remedial in nature and permits court to consider a motion to substitute in the face of a pending motion to dismiss. 136 CA 99. Plaintiff should have moved to have a proper party plaintiff substituted for him in mortgage foreclosure action. 149 CA 224. Plaintiffs did not demonstrate that their belief that they were proper parties to commence action was a reasonable one, held in good faith and not the result of their own negligence in failing to name the proper party such as to constitute mistake under section. 157 CA 55. The term “mistake” as used in section does not mean the absence of negligence. 165 CA 239. Substitution is not categorically barred in every situation in which the decedent pre-deceases the commencement of the original action. 176 CA 64. Administrative appeals commenced under Sec. 4-183 are “actions” salvageable under this section where administrative appeal has been commenced in the name of an improper party due to a mistake. Id. Substitution under section is not categorically unavailable to cure suits commenced by unauthorized parties. Id.

Cited. 18 CS 446. To determine the real matter in dispute, substitution of plaintiff must be allowed. 49 CS 542.

Notes of Decisions
Cited in 37 cases (5 in the last 5 years), 1979–2026 · leading case: Dilieto v. Cnty. Obstetrics & Gynecology Grp., P.C., 998 A.2d 730 (Conn. 2010).
Dilieto v. Cnty. Obstetrics & Gynecology Grp., P.C., 998 A.2d 730 (Conn. 2010). · cites it 27× “The defendants contend that the offers of judgment were invalid and unenforceable and, further, that the trial court improperly concluded that the substitution of Daly as the plaintiff pursuant to General Statutes § 52-109 41 and Practice Book § 9-20 42 retroactively validated…”
Freese v. Dep't of Soc. Servs. Gustav Cariglio, 169 A.3d 237 (Conn. App. Ct. 2017). · cites it 40× “In these consolidated administrative appeals, the defendant, the Department of Social Services, denied applications for Medicaid benefits that the plaintiffs filed on behalf of their respective mothers, Noreen McCusker and Arlene Cariglio (Arlene), both of whom died before the…”
Rana v. Terdjanian, 46 A.3d 175 (Conn. App. Ct. 2012). · cites it 15× “” On October 22,2010, rather than briefing the standing issue, Rana’s counsel filed a motion pursuant to General Statutes § 52-109 and Practice Book § 9-20 seeking to substitute the plaintiff and Syed for Rana as the real parties in interest and for leave to amend the complaint.”
Wilson v. Zemba, 896 A.2d 862 (Conn. Super. Ct. 2004). · cites it 21× “Whether the defendant’s motion should be granted depends on the appropriate application of General Statutes § 52-109, which provides: “When any action has been commenced in the name of the wrong person as plaintiff, the court may, if satisfied that it was so commenced through…”
Ion Bank v. J.C.C. Custom Homes, LLC, 206 A.3d 208 (Conn. App. Ct. 2019). · cites it 11× “The plaintiff argued with respect to the issue of standing that (1) Nutmeg was substituted in as the real plaintiff in interest by virtue of the amended complaint it filed pursuant to Practice Book § 10-59, (2) even if it was not entitled to substitute in Nutmeg as a matter of…”
Manning v. Feltman, 91 A.3d 466 (Conn. App. Ct. 2014). · cites it 6× “10 It was incumbent upon the plaintiff to seek to have a proper party plaintiff substituted for him under General Statutes § 52-109. See DiLieto v.”
Lupinacci v. City of Stamford, 823 A.2d 456 (Conn. Super. Ct. 2002). · cites it 17× “2d 815 (1991), the court affirmed dismissal of the intervening complaint despite the timely filing of a motion to substitute a party plaintiff because the proposed substitution was not necessary for the determination of the real matter in dispute, one of the *5 requirements for…”
Joblin v. LaBow, 635 A.2d 874 (Conn. App. Ct. 1993). · cites it 4× “In general, substitution is permitted where an action was commenced in the name of the wrong person; General Statutes § 52-109; Practice Book § 101; in cases of misjoinder and nonjoinder; Practice Book § 100; and in cases of assignment.”
Fed. Deposit Ins. v. Ret. Mgmt. Grp., Inc., 623 A.2d 517 (Conn. App. Ct. 1993). · cites it 2× “” Both rules, of necessity, relate back to and correct, retroactively, any defect in a prior pleading concerning the identity of the real party in interest.”
Wickes Mfg. Co. v. Currier Elec. Co., 596 A.2d 1331 (Conn. App. Ct. 1991). · cites it 3× “” General Statutes § 52-109; Practice Book § 101.”
Am.'s Wholesale Lender v. Silberstein, 866 A.2d 695 (Conn. App. Ct. 2005). · cites it 3× “The court concluded that Countrywide had commenced an action in the name of the wrong person and, therefore, substituted Mortgage Systems pursuant to General Statutes § 52-109. The court ultimately rendered summary judgment in favor of the substitute plaintiff, the defendants’…”
Cardi Materials Corp. v. Connecticut Landscaping Bruzzi Corp., 823 A.2d 1271 (Conn. App. Ct. 2003). · cites it 2× “Such a substitution may be permissible pursuant to General Statutes § 52-109 and Practice Book § 9-20.”
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