South Dakota Trust Litigation Lawyers: Contesting A Trust

Last updated on May 14, 2026

In South Dakota, the laws surrounding trusts and their administration can be complicated, making it difficult to know where to begin. Contesting a trust can also be an emotional process. The legal team at Reiter Law Firm knows and understands that challenging a trust can be a sensitive matter that might impact family dynamics.

Our trust litigation attorneys in Sioux Falls provide respectful and compassionate legal advice during difficult estate administration challenges. Our trust contest lawyers have extensive experience handling complex litigation matters. We represent clients throughout South Dakota.

Understanding The Conflicts That Lead To Trust Litigation

South Dakota law governs how trusts are administered, ensuring they align with the wishes of the trust creator. Conflicts can arise for various reasons, which could lead to trust litigation. Conflicts may involve disputes over the trust’s validity, disagreements among beneficiaries or issues with how a trustee manages the trust. Understanding these conflicts is crucial when considering litigation.

What Is A Trust Contest?

A trust contest is a legal challenge against the validity or terms of a trust. It involves questioning the trust’s formation or administration, often requiring court intervention to resolve disputes. Trust contests can arise from various issues, including those related to the trust’s creation or the actions of its trustees.

What Are The Reasons To Contest A Trust?

There are several reasons to contest the validity of a trust. These can include:

• Undue influence: The court may find undue influence occurred if someone pressured the trust creator to alter the trust in their favor. If undue influence is found, the court can rule that the trust is invalid.
• Lack of capacity: If the court finds that there was a lack of capacity, it means that the creator of the trust was found to be mentally incompetent when they created the trust. A trust creator must have been mentally competent to form a trust.
• Fraud: If deceit influences the creation of the trust or its terms, it can be grounds for contesting its validity.

Contesting a trust is complex and requires careful consideration of family dynamics. Whether you are a beneficiary or believe you should be one, our trust administration attorneys can provide legal guidance and advice regarding your rights to challenge the trust. Likewise, if you are a trustee facing a challenge to the trust you manage, our litigators can represent your interests as a fiduciary.

Addressing Breach Of Fiduciary Duty In Trust Contests

Trustees have a fiduciary duty to the beneficiaries of the trusts they administer. They should make decisions and manage trust resources with a focus on the best interests of beneficiaries to the exclusion of their own. When a trustee violates that trust, either through self-dealing, embezzlement, incompetence, favoritism or some other means, legal action is necessary.

An experienced attorney can help you demand a formal accounting, take the necessary steps to stop the trustee from doing further financial harm, negotiate a resolution to the problems and, when necessary, engage in litigation to protect your interests.

Frequently Asked Questions About South Dakota Trust Contests

Questions about trust litigation are common, as the process is complex. Learning about the process in advance is critical for beneficiaries and other interested parties.

Who has legal standing to contest a trust in South Dakota?

South Dakota only allows interested parties to contest a trust. They must have a direct financial stake in the administration of the trust or the outcome of the contest.

Current and former beneficiaries, people named as beneficiaries who were removed and heirs-at-law who might inherit property if the trust is invalid have the right to contest the trust. Additionally, trustees can contest claims related to the trust, while creditors could potentially challenge asset transfers.

Why do out-of-state beneficiaries need a South Dakota litigator?

South Dakota’s unique trust and tax laws are too complex for people to navigate on their own. Out-of-state attorneys may be unfamiliar with the strong asset protection regulations and unique trust statutes, including laws that allow dynasty trusts that persist for generations. Those intending to contest a South Dakota trust while living elsewhere need legal guidance and insight from a professional familiar with South Dakota’s unique laws.

How does a trust contest impact family businesses or farm assets?

Contests can freeze farm and business operations, damage family relationships and generate major costs. A trust contest may prevent any transfers or significant decisions about operations until the courts resolve the lawsuit. Frozen assets, continuity issues and harm to working family relationships can all have devastating consequences for businesses and farms. Proper support during trust litigation is critical to minimize the harm caused by a trust contest.

Schedule A Consultation With A Trust Contests Attorney

If you are considering contesting a trust or defending against a challenge, call Reiter Law Firm at 605-800-8825 or complete the form below.