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Mary Nan Dupont

Mary Nan practices law in the area of estate planning and trust and estate administration. The primary focus of her legal practice is to provide high quality and affordable legal services to all clients regardless of the size or complexity of the matter.  In addition to traditional estate planning, she assists clients with gifting techniques to minimize exposure to estate taxes, assists clients with charitable giving strategies, helps business owners structure business succession plans, and implements planning for individuals in need of asset protection planning.  She also helps clients prepare gift and estate tax returns.

Mary Nan is licensed in both Kansas and Missouri and has been practicing law for over 30 years. After a one-year clerkship with federal court of appeals Judge John R. Gibson, she began her legal career at Spencer Fane Britt & Browne, achieving partnership status. Following that, Mary Nan owned her own firm for 15 years prior to joining Sage Law, LLP in 2017.

Mary Nan received her undergraduate degree from the University of Missouri – Columbia, with a B.S.B.A in Finance and Economics (Magna Cum Laude) and her law degree from the University of Missouri – Columbia (Cum Laude, Order of the Coif and Law Review).

Mary Nan enjoys making presentations for local estate planning organizations, businesses, and non-profits and has spoken on the following topics:  Charitable Giving Techniques, Private Foundations vs. Community Foundation Funds, Planning for Disability, Choosing a Fiduciary, The Use of Disclaimers in the Spousal Situation, Joint Trusts – When to Use and When Not to Use, What to do When the Client Dies, Everybody Needs a Plan: Dispelling the Myths of Estate Planning, Business Succession Planning – Survival of the Family Business, Generation Skipping Transfer Tax Issues, Medicaid, Medicare, and Social Security Planning Issues, Handling Unique Assets in Estate Planning,  She also taught an Elder Law class at UMKC as an adjunct professor.

Born and raised in Chillicothe, Missouri, Mary Nan comes from a family of attorneys going back to her great grandfather, Lewis Chapman, who founded the Chapman law firm in Chillicothe in 1870.  Her grandfather, father, and brother are also attorneys.  She was greatly influenced by her father, Don Chapman, to be an estate planner.

Mary Nan is married to Michael Thiessen and the mother of three grown children, Nicholas (a medical biostatistician in Tucson, AZ), Elisabeth (a nurse in Rochester, MN) and Caroline (a financial planner in Chicago). Mary Nan is active in the Kansas City Symphony League, the Lyric Opera Circle, and the Children’s Mercy Planned Giving Council.