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Stipulation does not serve as collateral estoppel
Discovery

Stipulation does not serve as collateral estoppel

By Jason Tenenbaum 2 min read

Key Takeaway

Court ruling clarifies that stipulations don't create collateral estoppel in NY no-fault insurance cases, plus guidance on SIU file discovery and licensing compliance.

This article is part of our ongoing discovery coverage, with 289 published articles analyzing discovery 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.

All Boro Psychological Servs., P.C. v Allstate Ins. Co., 2014 NY Slip Op 50870(U)(App. Term 2d Dept. 2014)

Remember the stipulation where the releasee agreed that the medical provider was properly formed and complied with all applicable licensing laws?  At some point, you might have signed one and rued the consequences for the carelesness.  Well, today, it is okay.

(1) “With respect to defendant’s cross motion, plaintiff contends that defendant is not entitled to any discovery regarding whether plaintiff is a professional service corporation which fails to comply with applicable state or local licensing laws (see State Farm Mut. Auto. Ins. Co. v Mallela, 4 NY3d 313 ) because defendant previously entered into stipulations, in unrelated actions, which, among other things, stated that, as of the date the stipulations were entered into, plaintiff was “in full compliance with any licensing requirements affecting its right to obtain reimbursement under the applicable No Fault laws and regulations.” However, as the issue was resolved in a stipulation and not after it was actually litigated, the doctrine of collateral estoppel is inapplicable”

But the SIU file?  It is discoverable.

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(2) “To avoid having to produce its SIU file, defendant had to establish that its SIU file was prepared solely for litigation (Landmark Ins. Co. v Beau Rivage Rest., 121 AD2d 98, 101 ; see also Bombard v Amica Mut. Ins. Co., 11 AD3d 647 ). As defendant failed to demonstrate that it had decided to deny plaintiff’s claims prior to commencing its investigation, the contents of defendant’s SIU file are not privileged and are discoverable (Bombard, 11 AD3d at 648).”

And of course, Mallela discovery is always allowed

(3) “Contrary to plaintiff’s contention, defendant sufficiently demonstrated that defendant’s discovery demands which concerned a Mallela defense are “material and necessary in the prosecution or defense of an action” (CPLR 3101 ; All Boro Psychological Servs., P.C. v Allstate Ins. Co., 40 Misc 3d 131, 2013 NY Slip Op 51124 ; Medical Polis, P.C. v Progressive Specialty Ins. Co., 34 Misc 3d 153, 2012 NY Slip Op 50342 ). Defendant further established its entitlement to depose Vladimir Grinberg and plaintiff’s owner, Dr. John Braun”


Legal Update (February 2026): Since this 2014 decision, New York courts have continued to refine the application of collateral estoppel principles in no-fault litigation, and discovery standards regarding SIU files and licensing compliance may have evolved through subsequent appellate decisions and regulatory amendments. Practitioners should verify current case law interpretations and any updates to CPLR provisions governing discovery in no-fault insurance disputes.

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

Discovery Practice in New York Courts

Discovery is the pre-trial process through which parties exchange information relevant to the dispute. In New York, discovery practice is governed by CPLR Article 31 and involves depositions, interrogatories, document demands, and physical examinations. Disputes over the scope of discovery, compliance with demands, and sanctions for noncompliance are frequent in both no-fault and personal injury cases. These articles analyze discovery rules, court decisions on discovery disputes, and strategies for effective discovery practice.

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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 discovery 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.

Jason Tenenbaum, Personal Injury Attorney serving Long Island, Nassau County and Suffolk County

Reviewed & Verified By

Jason Tenenbaum, Esq.

Jason Tenenbaum is a personal injury attorney serving Long Island, Nassau & Suffolk Counties, and New York City. Admitted to practice in NY, NJ, FL, TX, GA, MI, and Federal courts, Jason is one of the few attorneys who writes his own appeals and tries his own cases. Since 2002, he has authored over 2,353 articles on no-fault insurance law, personal injury, and employment law — a resource other attorneys rely on to stay current on New York appellate decisions.

Education
Syracuse University College of Law
Experience
24+ Years
Articles
2,353+ Published
Licensed In
7 States + Federal

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