Allan E. Mayefsky - New York, NY
Attorney at Aronson Mayefsky & Sloan, LLP
Matrimonial and family law, including equitable distribution (including high-net-worth cases) Lawyers in New York, NY
12 East 49th Street 32nd Floor New York, NY 10017
- 1 Super Lawyers®
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47
Years
Experience
New York Matrimonial and family law, including equitable distribution (including high-net-worth cases) Lawyer
Updated: 10/22/2026
Areas of Practice
- Matrimonial and family law, including equitable distribution (including high-net-worth cases)
- Child custody and visitation
- Maintenance and child support
- Prenuptial, postnuptial, and separation agreements
- Matrimonial trial practice
- Neutral evaluation, mediation, and discovery master appointments in complex financial cases
Attorney Information
Overview
Allan graduated cum laude from Harvard Law School in 1978 after receiving his B.A. degree summa cum laude from Cornell University, where he was a member of Phi Beta Kappa and Pi Lambda Phi. In more than 40 years as an attorney, Allan has gained extensive trial experience, including successfully litigating to conclusion some of the largest equitable distribution cases in New York.
Allan has also been appointed on several occasions by the New York State Supreme Court to conduct neutral evaluations of cases in an effort to reach settlements. He has also conducted mediations for that purpose at the request of litigants and has been appointed to serve as a discovery master in complex financial cases. Allan and his wife, Debra, live in Battery Park City in Manhattan.
In addition to serving as the firm's managing partner, Allan also serves as its General Counsel.
Awards and Honors
Honors
- Recognized By Best Lawyers in 2026.
- Named Lawyer of the Year in Family Law for New York City by U.S. News – “Best Lawyers in America”© in 2019.
- Named Lawyer of the Year in Family Law for New York City by U.S. News – “Best Lawyers in America”© in 2015.
- AV Preeminent rating in 2026, recognizing his legal excellence and commitment to the highest ethical standards.
- Recognized in The Best Lawyers in America® 2027.
- Selected to Super Lawyers: 2006 - 2026
- Top 100: New York — Metro Super Lawyers: 2010 - 2012
Other Sources of Feedback About Allan E. Mayefsky
Included on the 2026 New York Metro Super Lawyers list
Past Lists
- 2025 New York Metro Super Lawyers list
- 2024 New York Metro Super Lawyers list
- 2023 New York Metro Super Lawyers list
- 2022 New York Metro Super Lawyers list
- 2021 New York Metro Super Lawyers list
- 2020 New York Metro Super Lawyers list
- 2019 New York Metro Super Lawyers list
- 2018 New York Metro Super Lawyers list
- 2017 New York Metro Super Lawyers list
- 2016 New York Metro Super Lawyers list
- 2015 New York Metro Super Lawyers list
- 2014 New York Metro Super Lawyers list
- 2013 New York Metro Super Lawyers list
- 2012 New York — Metro Super Lawyers list
- 2011 New York Metro Super Lawyers list
- 2010 New York Metro Super Lawyers list
- 2009 New York Metro Super Lawyers list
- 2008 New York Metro Super Lawyers list
- 2007 New York Metro Super Lawyers list
- 2006 New York Metro Super Lawyers list
Education
Legal Education
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Harvard Law School, Cambridge, Massachusetts, 1978
J.D.
Honors: cum laude
Non Legal Education
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Cornell University, College of Arts and Sciences, Ithaca, NY, 1975
B.A., Government and Economics
Honors: summa cum laude
Current Employment Position(s)
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Founding Partner
Past Positions
- Member, Matrimonial Commission appointed by Chief Judge Judith S. Kaye to study matrimonial law reform (findings reported in February 2006)
- Court-appointed neutral evaluator, New York State Supreme Court (appointed on several occasions)
- Court-appointed discovery master in complex financial cases, New York State Supreme Court
- Mediator, at the request of litigants
Languages
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English
Classes and Seminars
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A general overview of equitable distribution in New York State
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Trial presentation of support issues in high income cases
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Enhanced earning capacity as an asset to be valued in equitable distribution cases
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Discovery, valuation, and trial issues with respect to cash businesses
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Use of tax returns in matrimonial actions
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Overview of the New York Family Court Act
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Equitable distribution in high net worth cases
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Equitable distribution: equal and unequal distribution
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Drafting separation and prenuptial agreements
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Separate property issues in equitable distribution cases
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Cross-Examination: Selected Problems – Some Easy Rules That Are Not So Easy to Apply (AAML)
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Matrimonial Law: A Case Law Update (Supreme Court Appellate Division, First Department)
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Matrimonial and Family Law: The Changing Economy and Critical Issues – What You Need to Know: Drafting for Bankruptcy Considerations (New York State Bar Association)
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How to Litigate a Child Custody Case (New York County Lawyers)
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Drafting Custody and Visitation Provisions (New York State Bar Association)
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Matrimonial Case Law Update: A Review of Developing Issues in Matrimonial Law (Supreme Court Appellate Division, First Department)
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The United States Supreme Court’s Troxel Decision and its Impact on Non-Parental Visitation (AAML)
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Handling Your First Contested Divorce Case (New York State Bar Association)
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Recognizing Estate Planning and Real Estate Issues in Matrimonial Matters (New York State Bar Association)
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Selected Recurring Issues in Matrimonial Practice: Successfully Handling the Challenges (New York State Bar Association)
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The Expanding World of the Matrimonial Lawyer: New Cases, New Procedures and New Areas of Law: Discovery (New York State Bar Association)
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Handling a Child Custody Case: Intake to Trial (New York State Bar Association)
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Matrimonial and Family Law Update: “Double Dipping” When a Professional License/Practice Is in the Case (New York State Bar Association)
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Practical Skills Seminar: Basic Matrimonial Practice (New York State Bar Association)
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Presenting Valuation Evidence at Trial and for Appeal (New York State Bar Association)
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Show Me the Money: Discovery and Treatment of Hidden Assets (AAML)
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The ABCs of Drafting Prenuptial Agreements and Other Matrimonial Agreements (New York State Bar Association)
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Understanding Child Support and Custody: Significant Decisions Under the CSSA (Practicing Law Institute)
- The Construction of a Prenuptial Agreement (Association of the Bar of the City of New York)
Published Works
Articles
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“Temporary Maintenance Statute in Practice,” New York Law Journal, Vol. 247, New York State Bar Association (May 2, 2012)
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“Determining Whether ‘No-Fault’ Law Allows Trials When Parties Disagree,” New York Law Journal, Vol. 246, No. 41, New York State Bar Association (August 29, 2011)
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“Understanding New York’s O’Brien Decision and its Progeny,” co-authored with Peter R. Stambleck (2010)
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“Setting Valuation Dates for Marital Property in Global Economic Crisis,” New York Law Journal, Vol. 242, No. 73, New York State Bar Association (October 14, 2009)
Bar Admissions
- New York, 1979
- U.S. District Court Southern District of New York, 1979
- U.S. District Court Eastern District of New York, 1979
- U.S. Court of Appeals 2nd Circuit, 1983
- U.S. Court of Appeals 11th Circuit, 1986
Other Affiliations
- American Academy of Matrimonial Lawyers (AAML), New York Chapter: Past President; served as counsel to the AAML
- American Academy of Matrimonial Lawyers Foundation: Past Member of the Board of Directors; served as counsel to the Foundation
- International Academy of Family Lawyers: Member
- American College of Family Trial Lawyers: Member
- Association of the Bar of the City of New York: Member
- New York State Bar Association: Member; Executive Committee of the Family Law Section
- American Bar Association: Member
Fraternities and Sororities
- Phi Beta Kappa
- Pi Lambda Phi
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