Monson v. Monson

CourtIdaho Supreme Court
DecidedMarch 18, 2026
Docket51838
StatusPublished

This text of Monson v. Monson (Monson v. Monson) is published on Counsel Stack Legal Research, covering Idaho Supreme Court primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Monson v. Monson, (Idaho 2026).

Opinion

IN THE SUPREME COURT OF THE STATE OF IDAHO Docket No. 51838

RYAN MONSON, an individual, ) ) Plaintiff-Appellant- ) Blackfoot, October 2025 Term Cross Respondent, ) ) Opinion Filed: March 18, 2026 v. ) ) Melanie Gagnepain, Clerk NANCY J. MONSON, individually, and ) TAUTPHAUS PARK STORAGE, LLC, an ) SUBSTITUTE OPINION.THE Idaho limited liability company; and NANCY ) COURT’S PRIOR OPINION DATED J. MONSON, Personal Representative of the ) DECEMBER 23, 2025, IS HEREBY ESTATE OF HAL LAMAR MONSON, ) WITHDRAWN. ) Defendants-Respondents- ) Cross Appellants. )

Appeal from the District Court of the Seventh Judicial District, State of Idaho, Bonneville County. Andrew R. Woolf, Magistrate Judge. Bruce L. Pickett, District Judge.

The judgments of the magistrate and district courts are vacated, the orders dismissing parties and claims are reversed, and the case is remanded.

Parsons Behle & Latimer, Idaho Falls, for Appellant, Ryan Monson. John E. Cutler argued.

Beard St. Clair Gaffney PA, Idaho Falls, for Respondents, Nancy J. Monson, individually, and Tautphaus Park Storage LLC. John Avondet argued.

Merrill & Merrill, Chtd., Pocatello, for Respondent Nancy J. Monson, as personal representative of the Estate of Hal Lamar Monson. Mary E. Shea argued. _____________________

MEYER, Justice. This appeal arises from a dispute between siblings, Ryan and Nancy J. Monson, regarding their father’s ownership interest in Tautphaus Park Storage, LLC (TPS), and the administration of the estate of their father, Hal Monson. 1 Following the district court’s judgment dismissing Ryan’s

1 Because the parties share the same surname, Ryan Monson, Nancy Monson, and Hal Monson will be referred to by their first names.

1 complaint, Ryan appealed from the judgments that incrementally dismissed his claims against his sister, both in her individual capacity and in her capacity as personal representative of their father’s estate. 2 Ryan’s complaint sought a judicial determination of their respective rights and interests in Hal’s estate under the Idaho Trust and Estate Dispute Resolution Act (TEDRA), following Nancy’s acquisition of TPS through amendments to its operating agreement made after their father’s passing. For the reasons explained below, we vacate the judgments issued by the magistrate court and the district court. We reverse, in part, the magistrate court’s order entered on May 31, 2022, captioned as “Orders,” which dismissed Ryan’s causes of action alleged against Nancy and TPS for judicial determination of the estate and breach of fiduciary duty because Nancy is a necessary party and TPS is a nominal party. In addition, we reverse, in part, the district court’s order entered on February 23, 2024, captioned as “Memorandum Decision on Plaintiff’s Motion to Reconsider, Plaintiff’s Motion for Partial Summary Judgment, Defendant’s Motion to Dismiss, and Defendant’s Motion for Summary Judgment” because Ryan’s claims for judicial determination of the estate and breach of fiduciary duty fall within TEDRA’s definition of “matters” and may be raised in a separate civil action. I. FACTUAL AND PROCEDURAL BACKGROUND A. Factual Background Ryan and Nancy are siblings disputing the administration of Hal’s estate and the status of Hal’s ownership interest in TPS, a limited liability company he founded to operate a storage facility. Nancy, an Idaho-licensed attorney, served as Hal’s lawyer, drafted his last will and testament, and acted as his power of attorney before his death. After Hal passed, she became the personal representative of his estate. A third sibling, whom Hal intentionally omitted from his will, is not involved in this case. Although the record does not contain a copy of the will or the power of attorney, the parties agree that Ryan and Nancy are equal beneficiaries of Hal’s estate. When Hal died on July 29, 2019, he suffered from dementia. The date of the onset of his dementia is unclear, but the record reflects progressive memory impairment. Correspondence from

2 We distinguish between Nancy’s various roles to avoid confusion regarding her involvement in the litigation. “Nancy, as personal representative” refers specifically to her role as the personal representative of Hal’s estate. “Nancy” denotes her individual capacity. “Nancy, in both capacities,” indicates her individual and personal representative roles combined. If she acted in other capacities, such as attorney for her father or TPS, that will be indicated.

2 Nancy to Ryan in 2019 describes “significant symptoms” beginning in 2014, and Nancy later declared in the probate case that Hal “began to suffer the debilitating effects of memory loss as early as 2011.” Hal formed TPS on July 23, 2001, serving as manager and sole voting member. He contributed real property valued at $737,605 as its initial capital. Nancy states that she became actively involved in TPS’s operations beginning in 2003, providing legal services and assisting with amendments to the company’s operating agreement, policies, and management issues. TPS’s ownership and control changed over time. In a second amendment to the operating agreement 3 dated March 11, 2015, which was made retroactive to July 25, 2008, Hal added Nancy as a non-voting member. Both Hal and Nancy signed the amendment, and it was notarized. In a third amendment executed in May 2018, Hal resigned as manager “under permanent disability,” resulting in Nancy becoming the manager and the sole voting member. Hal retained non-voting status. This amendment was signed by both Hal and Nancy but was not notarized. After Hal’s death, and shortly after Ryan had sent Nancy an email dated November 14, 2019, requesting a copy of the operating agreement, Nancy executed a fourth and a fifth amendment to the operating agreement, both of which purported to be retroactively effective as of January 1, 2017. These amendments were executed on December 3, 2019. The fourth amendment stated that Hal resigned all management and membership rights due to permanent disability, effective January 1, 2017, retaining only a diminished economic interest: 99 percent in 2017, and one percent from 2018 through his death in 2019. It also recast Hal’s original capital contribution as a personal loan to TPS, and declared the loan fully repaid as of January 1, 2015. The amendment identified $334,484 in personal and in-kind contributions by Nancy between 2015 and 2018 and attached a “Loan Principal Repayment” exhibit containing a revised accounting. Nancy later described the fourth amendment as an effort to “memorialize” past events and changes to TPS. In October 2019, Nancy terminated TPS’s longtime accountant. According to the accountant, TPS’s tax filings from 2013 to 2018 consistently reflected that Hal held a 99 percent ownership interest and Nancy held only one percent. None of the transactions described in the fourth amendment were reflected in those filings. With assistance from a new accountant, Nancy amended the 2018 K-1s for TPS, Nancy, and Hal to reverse the reported ownership percentages.

3 Hal executed the first amendment, which is not relevant to the case, on April 14, 2006.

3 A Schedule K-1 tax form reports an individual’s share of income, deductions, and credits from a partnership, S-corporation, or trust for that individual’s income tax return. In May 2022, Nancy sold TPS’s assets for just over $3 million. B. Procedural Background The procedural history in this matter is complicated, partially because the parties were involved in two cases: a magistrate court probate case, In the Matter of the Estate of Hal Lamar Monson, Bonneville County Case No. CV10-19-5680, and a district court TEDRA case, Monson v. Monson, Bonneville County Case No. CV10-21-1739, which is the subject of this appeal.

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Monson v. Monson, Counsel Stack Legal Research, https://law.counselstack.com/opinion/monson-v-monson-idaho-2026.