Bonnie Lynn Chmil

Location: New York, USA,
Expertise: Contentious Trusts,

Shortlisted

Magic Circle Awards - 2026

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IFC Awards - 2026

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Future Leaders Awards - 2025

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Brand & Marketing Awards - 2026

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Powerwomen Inernational Awards - 2025

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Powerwomen USA Awards - 2025

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Latest Article

Top 100 International Private Client Litigation Lawyers 2022

Citywealth is pleased to present the Top 100 International Private Client Litigation Lawyers, a top-rated list of the ‘need to know’ people in the litigation industry based on recommendations from clients and peers.

Read more

Latest Review

Peer review:
"Thoughtful, understanding, practical and realistic in expediting clients wishes."
Litigation feature Karen - Editorial
17 May 2020

Profile

Bonnie Lynn Chmil is a partner in the Private Wealth practice at Katten. She advises high-net-worth individuals and families as well as fiduciary trust companies and banks and other companies that offer trust and private wealth services in high-stakes litigation. She balances her extensive experience in commercial and real estate litigation with a sensitivity to the needs and expectations of private clients and fiduciaries. From the outset of any dispute, she collaborates with the Private Wealth team to prevent fights before they happen through integrated planning, administration and risk assessment. When litigation ensues, she guides her clients toward satisfactory resolutions by creating win-win settlement opportunities, and teams with the Private Wealth group to create planning opportunities as part of a settlement that would not have been available absent litigation. Private client and fiduciary litigation, of course, is often fueled by emotions that are frequently not commercially rational. In resolving disputes, she works collaboratively with clients to determine what needs to be addressed in order to assuage hurt feelings, allow reason to prevail over retribution, and wherever possible restore family harmony.

What do clients and peers say of Bonnie Chmil: “Thoughtful, understanding, practical and realistic in expediting clients wishes.

Bonnie Lynn Chmil exemplifies the rare combination of legal precision, practical wisdom and sheer tenacity required in high-stakes private wealth litigation. Her ability to navigate emotionally charged disputes with calm resolve and commercial clarity sets her apart. Whether heading off conflict through strategic planning or guiding clients through complex litigation, she brings a work ethic and level-headedness that ensure even the most sensitive matters are handled with grit, grace and measurable results.

Contact

50 Rockefeller Plaza
New York, NY 10020-1605

Reviews

Peer review:
"Thoughtful, understanding, practical and realistic in expediting clients wishes."
Litigation feature Karen - Editorial
17 May 2020
Peer review:
Citywealth recommended
Dora - Seres
11 Mar 2020

Case Studies

Successful defence of a contested will

My partner, Joshua Rubenstein and I, obtained an extremely favorable decision from the Surrogate‘s Court, Westchester County on behalf of the executors of an estate of a prominent real estate entrepreneur in New York. He died with a gross estate of $280 million, the bulk of which was left to his wife in a QTIP trust, the remainder of which would pass to a son from his first marriage and two sons from his second marriage upon her death. His other two children from his first marriage, for whom he made bequests of $2 million each and substantial additional provisions outside of his will, filed a claim against the estate, seeking in excess of $85 million, based on the decedent‘s alleged breach of an obligation in a separation agreement with his first wife to make a bequest in his will to the children of that marriage of a sum equal to one-third of his net estate and of his coin collection. Their claim was based on their belief that the bequests were to be divided equally among the children of the first marriage and had to be made outright and not in a remainder interest, and also was inflated by their theories that their brother had irrevocably waived his claim with respect to the decedent‘s obligations under the separation agreement, entitling them to the entire one-third of the net estate, and that they were “contract creditors” against whom taxes could not be apportioned and entitling them to 9% prejudgment interest from the date of death. On the petitioners‘ motion and our cross-motion for partial summary judgment, the court held that the petitioners were not entitled to their brother‘s share of one-third of the net estate because their brother had effectively retracted his waiver of the decedent‘s performance under the separation agreement, and that the separation agreement permitted the decedent to make a bequest to one or more of such children as a remainder beneficiary of a trust and, more significantly, did not require that the bequests be made in equal shares among the children. The court further held that the petitioners are not contract creditors but merely have a right in equity to enforce the decedent‘s obligation, and therefore, to the extent the court ultimately determined that the decedent breached his obligation to bequeath one-third of his estate to these children and that the petitioners were entitled to enforce that obligation to the extent of any shortfall, the petitioners would be requires they pay their pro rata share of any estate taxes. This decision dramatically reduced the likelihood of any potential recovery by petitioners of any share at all of the coin collection and any shortfall in the decedent‘s bequest of one-third of his net estate. As a result, the matter ultimately settled at a small fraction of what the petitioners had been seeking.

Articles

Top 100 International Private Client Litigation Lawyers 2022

Citywealth is pleased to present the Top 100 International Private Client Litigation Lawyers, a top-rated list of the ‘need to know’ people in the litigation industry based on recommendations from clients and peers.

Read more
News release: Citywealth’s Top 100 trust litigators and polymaths

Citywealth conducted a research programme over several months to create a Top trust litigator list fit for purpose. One of the key questions asked was: who has impressed you most during current or past litigations? Their answers have revealed a list of peer recommended litigators who have negotiated

Read more

Awards

2023 Magic Circle Awards
GOLD - Woman of the Year

Commendations

Top 100 International Private Client Litigation Lawyers 2022, 2023
Citywealth's Top 100 trust litigators and polymaths
Citywealth Top 10 Powerwomen Trust Litigators