Key Takeaway
NY court rules unpleaded defenses can support summary judgment motions without prejudice or surprise to opposing party in insurance litigation.
This article is part of our ongoing declaratory judgment action coverage, with 56 published articles analyzing declaratory judgment action issues across New York State. Attorney Jason Tenenbaum brings 24+ years of hands-on experience to this analysis, drawing from his work on more than 1,000 appeals, over 100,000 no-fault cases, and recovery of over $100 million for clients throughout Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, and the Bronx. For personalized legal advice about how these principles apply to your specific situation, contact our Long Island office at (516) 750-0595 for a free consultation.
J.K.M. Med. Care, P.C. v Liberty Mut. Fire Ins. Co., 2016 NY Slip Op 51071(u)(App. Term 2d Dept. 2016)
“The rule is that “an unpleaded defense may serve as the basis for granting summary judgment in the absence of surprise or prejudice to the opposing party” (Sullivan v American Airlines, Inc., 80 AD3d 600, 602 ). Here, defendant failed to include res judicata as an affirmative defense in its answer, or to move to dismiss the complaint on that ground pursuant to CPLR 3211 (a) (5) prior to serving its answer. Its remedy then was to move pursuant to CPLR 3025 (b) for leave to amend its answer in order to include that defense. Defendant never explicitly so moved and instead moved for summary judgment based on res judicata and also sought “such other and further relief as may deem just and proper.” As plaintiff, in opposition to defendant’s motion, failed to allege any prejudice (see Barrett v Kasco Constr. Co., 84 AD2d 555, 556 , affd 56 NY2d 830 ) or surprise (see CPLR 3018 ; Rogoff v San Juan Racing Assn., 54 NY2d 883, 885 ; Renelique v State-Wide Ins. Co., 50 Misc 3d 137, 2016 NY Slip Op 50096 ) resulting from defendant’s seeking summary judgment based on that unpleaded [*2]affirmative defense, under the circumstances, and in the interest of justice, we deem defendant’s answer amended to include the affirmative defense of res judicata”
The more expedient thing would be to plead all potential affirmative defenses in the initial answer. An argument could be made that it is not proper to allege affirmative defenses that are not applicable. Yet, the failure to plead anything under the sun leads to these types of cases. It is better to plead everything that seems relevant and to let the adversary move to dismiss the affirmative defenses as lacking merit. See e.g. AutoOne Ins. Co. v Eastern Is. Med. Care, P.C., 2016 NY Slip Op 05354 (2d Dept. 2016)
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Legal Update (February 2026): Since this 2016 decision, the CPLR provisions governing pleading amendments and summary judgment practice may have been subject to legislative amendments or rule changes. Additionally, subsequent appellate decisions may have further refined the standards for raising unpleaded defenses in summary judgment motions, particularly regarding the prejudice and surprise analysis discussed in this case. Practitioners should verify current CPLR 3025, 3018, and 3211 provisions and review recent case law developments in this area.
Legal Context
Why This Matters for Your Case
New York law is among the most complex and nuanced in the country, with distinct procedural rules, substantive doctrines, and court systems that differ significantly from other jurisdictions. The Civil Practice Law and Rules (CPLR) governs every stage of civil litigation, from service of process through trial and appeal. The Appellate Division, Appellate Term, and Court of Appeals create a rich and ever-evolving body of case law that practitioners must follow.
Attorney Jason Tenenbaum has practiced across these areas for over 24 years, writing more than 1,000 appellate briefs and publishing over 2,353 legal articles that attorneys and clients rely on for guidance. The analysis in this article reflects real courtroom experience — from motion practice in Civil Court and Supreme Court to oral arguments before the Appellate Division — and a deep understanding of how New York courts actually apply the law in practice.
About This Topic
Declaratory Judgment Actions in Insurance Law
Declaratory judgment actions under CPLR 3001 allow insurers and claimants to obtain a judicial determination of their rights under an insurance policy before or during the course of litigation. In the no-fault context, carriers frequently seek declaratory judgments on coverage, fraud, and policy procurement issues. These articles analyze the procedural requirements, strategic considerations, and substantive standards governing declaratory judgment practice in New York insurance disputes.
56 published articles in Declaratory Judgment Action
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Nov 12, 2013Common Questions
Frequently Asked Questions
What is a declaratory judgment action in insurance litigation?
A declaratory judgment action under CPLR 3001 asks the court to determine the rights and obligations of the parties under an insurance policy. In no-fault practice, insurers frequently file declaratory judgment actions to establish that they have no obligation to pay claims — for example, by seeking a declaration that the policy is void due to fraud or material misrepresentation on the application. Defendants can cross-move for summary judgment or raise counterclaims for the unpaid benefits.
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About the Author
Jason Tenenbaum, Esq.
Jason Tenenbaum is the founding attorney of the Law Office of Jason Tenenbaum, P.C., headquartered at 326 Walt Whitman Road, Suite C, Huntington Station, New York 11746. With over 24 years of experience since founding the firm in 2002, Jason has written more than 1,000 appeals, handled over 100,000 no-fault insurance cases, and recovered over $100 million for clients across Long Island, Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, the Bronx, and Staten Island. He is one of the few attorneys in the state who both writes his own appellate briefs and tries his own cases.
Jason is admitted to practice in New York, New Jersey, Florida, Texas, Georgia, and Michigan state courts, as well as multiple federal courts. His 2,353+ published legal articles analyzing New York case law, procedural developments, and litigation strategy make him one of the most prolific legal commentators in the state. He earned his Juris Doctor from Syracuse University College of Law.
Disclaimer: This article is published by the Law Office of Jason Tenenbaum, P.C. for informational and educational purposes only. It does not constitute legal advice, and no attorney-client relationship is formed by reading this content. The legal principles discussed may not apply to your specific situation, and the law may have changed since this article was last updated.
New York law varies by jurisdiction — court decisions in one Appellate Division department may not be followed in another, and local court rules in Nassau County Supreme Court differ from those in Suffolk County Supreme Court, Kings County Civil Court, or Queens County Supreme Court. The Appellate Division, Second Department (which covers Long Island, Brooklyn, Queens, and Staten Island) and the Appellate Term (which hears appeals from lower courts) each have distinct procedural requirements and precedents that affect litigation strategy.
If you need legal help with a declaratory judgment action matter, contact our office at (516) 750-0595 for a free consultation. We serve clients throughout Long Island (Huntington, Babylon, Islip, Brookhaven, Smithtown, Riverhead, Southampton, East Hampton), Nassau County (Hempstead, Garden City, Mineola, Great Neck, Manhasset, Freeport, Long Beach, Rockville Centre, Valley Stream, Westbury, Hicksville, Massapequa), Suffolk County (Hauppauge, Deer Park, Bay Shore, Central Islip, Patchogue, Brentwood), Queens, Brooklyn, Manhattan, the Bronx, Staten Island, and Westchester County. Prior results do not guarantee a similar outcome.