Probate Litigation Attorneys in Milwaukee, Wisconsin

When a loved one’s estate becomes contested — whether due to a suspicious will change, a sibling who took control of assets, or a trustee who isn’t accounting for funds — the matter moves into probate litigation. These cases are high-stakes, emotionally charged, and procedurally demanding.

At Gimbel, Reilly, Guerin & Brown, LLP, our Milwaukee probate litigation attorneys represent families and beneficiaries in contested wills, trust disputes, guardianship challenges, and fiduciary breach claims throughout Wisconsin. We are trial lawyers. When estate plans are challenged or assets are at risk, we litigate in Milwaukee County Probate Court and courts statewide.

The distinction between this practice and estate planning is direct. Estate planning attorneys draft wills and trusts. Probate litigation attorneys go to court when those documents are challenged, when fiduciaries mismanage assets, or when family members need to protect their inheritance rights in a contested proceeding. These are courtroom matters that turn on evidence, witnesses, and procedure rather than document drafting.

What Triggers Probate Litigation in Wisconsin?

Probate litigation arises when interested parties disagree about the validity of a will, the actions of a personal representative or trustee, or who should control and receive estate assets. Wisconsin offers both informal administration under Chapter 865, supervised by the Probate Registrar, and formal administration supervised by a circuit court judge. Contested matters generally proceed under formal administration, and Wisconsin requires the petitioner in a formal proceeding to be represented by an attorney. Informal administration does not carry that requirement.

The grounds for contesting a will or trust vary, but common triggers include:

• Last-minute changes: A will or trust amended shortly before the testator’s death, especially when a new beneficiary is added or an existing one removed.
• Caregiver influence: A family member, aide, or companion who gained disproportionate control over the testator during a period of declining health.
• Suspicious circumstances: A personal representative or trustee who refuses to share information, delays distributions, or makes self-dealing transactions.
• Capacity concerns: Evidence that the testator was suffering from dementia, cognitive decline, or medication effects at the time of signing.

Will Contests — The Common Legal Grounds

A Wisconsin will can be challenged on several grounds. Some come from Chapter 853 and others from Wisconsin case law:

• Improper execution: The will was not signed or witnessed in compliance with Wis. Stat. § 853.03. Wisconsin sets specific execution requirements, and a defect can render the document ineffective. Related provisions address self-proved wills and harmless error, so an execution challenge requires looking at the whole framework rather than one subsection.
• Lack of testamentary capacity: Under Wis. Stat. § 853.01, a person must be at least 18 and of sound mind to make a will. Wisconsin case law fills in what sound mind means, including whether the testator understood the nature and extent of their property and who the natural objects of their bounty were. Wisconsin courts have also held that a legal guardianship does not by itself prove lack of testamentary capacity.
• Undue influence: Wisconsin recognizes two routes. The four-element test requires susceptibility to undue influence, opportunity to influence, disposition to influence, and a coveted result. Alternatively, undue influence may be shown under a two-prong test: a confidential relationship between the testator and the favored beneficiary, together with suspicious circumstances surrounding the making of the will. Both come from In re Estate of Kamesar, 81 Wis. 2d 151 (1977).
• Fraud, duress, and mistake: The testator was deliberately misled about the nature or contents of the document, coerced into signing, or mistaken about a material fact. These grounds have their own elements and proof requirements.

Who Has Standing to Contest a Will?

Not everyone can challenge a will in Wisconsin. Standing generally belongs to those whose financial interest would be affected — named beneficiaries under the will, beneficiaries under an earlier will, and heirs who would inherit if no valid will existed. A disinherited child, a spouse excluded by a late amendment, or a sibling who believes a caregiver manipulated the testator may have standing if they fall within those categories.

Acting quickly matters. Raising an objection before a will is admitted to probate is procedurally simpler than seeking relief afterward. Anyone who has received notice of a probate proceeding and suspects the will is invalid should consult an attorney immediately, because the deadlines in probate practice are short and vary by the type of proceeding.

Trust Disputes and Fiduciary Breach Claims

Even when a will is valid, disputes frequently arise during trust administration. Trustees who mismanage assets, fail to distribute funds on schedule, favor themselves over beneficiaries, or refuse to provide accountings can be held liable under Wisconsin’s Trust Code. These claims can result in trustee removal and recovery of misappropriated assets.

The remedies available under Wis. Stat. § 701.1001 give Wisconsin circuit courts broad authority when a trustee breaches a duty. A court may:

• Compel the trustee to perform duties or provide a full accounting of trust assets and transactions.
• Suspend or remove the trustee under Wis. Stat. § 701.0706 and appoint a successor.
• Impose a constructive trust or an equitable lien on property the trustee wrongfully converted or transferred.
• Order restoration of value — under Wis. Stat. § 701.1002, a trustee who commits a breach of trust is liable to the beneficiaries for the resulting loss or depreciation in value, or the profit the trustee made from the breach, whichever is greater.

Trust disputes don’t always involve administration failures. Sometimes the trust itself was created under circumstances that warrant a challenge. Wis. Stat. § 701.0406 provides that a trust created by fraud, duress, or undue influence is void or voidable. Deadlines are short and easy to miss: under Wis. Stat. § 701.1005, a beneficiary generally must commence a proceeding against a trustee within one year after receiving a report that adequately discloses the potential claim. Where that one-year rule does not apply, a longer outside period runs from the first to occur of several events, including the trustee’s removal, resignation, or death, the termination of the beneficiary’s interest in the trust, or the termination of the trust.

Financial exploitation often drives these disputes. Wisconsin’s Department of Health Services reports financial exploitation as one of the most frequently reported categories of elder abuse in the state each year. When a family member or caregiver diverts trust assets for personal use, the line between trust administration and financial exploitation blurs quickly.

Can You Challenge a Guardianship in Wisconsin?

Yes. Guardianship disputes in Wisconsin arise when family members disagree about who should control a loved one’s personal or financial affairs, when a guardian abuses their authority, or when the guardianship should be modified or terminated. These proceedings are governed by Wis. Stat. Ch. 54 and handled in circuit court.

The types of guardianship disputes GRGB handles include:

• Contesting the appointment of a guardian: Under Wis. Stat. § 54.42, the proposed ward has the right to counsel and the right to a jury trial on demand. The demand must be made within the period the statute specifies before the hearing, and missing it can waive the right, so the timing should be confirmed as soon as a petition is served.
• Challenging a guardian’s actions: Wis. Stat. § 54.68 provides for court review of a guardian’s conduct when an interested party believes the guardian is acting improperly or against the ward’s interests.
• Seeking termination or modification: Under Wis. Stat. § 54.64, guardianships can be reviewed, modified, or terminated when circumstances change, including where the ward has regained capacity.
• Defending against improper petitions: Some guardianship petitions are filed by individuals seeking control over an elder’s assets rather than to protect the elder’s welfare. GRGB defends against these filings.

Financial exploitation is relevant here as well. When guardianship disputes involve allegations that a guardian is diverting the ward’s funds, the case often intersects with trust litigation and civil claims for conversion or fraud. GRGB has the litigation depth to pursue those claims in a coordinated proceeding before Milwaukee County Circuit Court’s Probate and Mental Health Division at 901 N. 9th Street.

Why Choose a Trial Lawyer for Probate Litigation — and Why GRGB?

Probate litigation is courtroom work. An attorney challenging a will on undue influence grounds must cross-examine witnesses, present medical testimony about the testator’s cognitive state, and argue evidentiary motions before a circuit court judge. An attorney defending a trustee must manage document-intensive discovery, prepare financial accountings, and present a coherent case under Wisconsin’s Trust Code.

GRGB was founded in 1968 by trial lawyers, and that courtroom orientation defines how the firm handles every contested estate matter. The firm’s probate litigation attorneys include practitioners rated AV Preeminent by Martindale-Hubbell and recognized as Super Lawyers, with experience in end-of-life succession disputes and contested probate proceedings across Milwaukee County and statewide. The firm’s trial credentials include National Trial Lawyers Top 100 designation.

Shepherd Express has recognized GRGB as ‘Best of Milwaukee’ in Estate Planning, a designation that covers the firm’s estate and probate litigation practice.

GRGB represents all sides of probate disputes:

• Beneficiaries: Challenging late-stage will amendments and distributions that do not reflect the decedent’s wishes.
• Personal representatives: Defending valid wills against challenges and administering contested estates under court supervision.
• Trustees: Responding to breach of fiduciary duty claims and defending trust administration decisions.
• Guardians and wards: Filing and defending guardianship petitions when a family member’s care or finances are at issue.

Working on both sides of contested matters, in separate cases, gives the firm familiarity with the arguments and pressure points of every position in a probate dispute.

The firm’s Milwaukee office at 330 East Kilbourn Avenue sits minutes from the Milwaukee County Courthouse at 901 N. 9th Street, where the Probate and Mental Health Division handles contested estate matters for Milwaukee County, with the Register in Probate in Room 207. GRGB also appears in Waukesha County Circuit Court at 515 W. Moreland Blvd. and in courts throughout Wisconsin.

Wisconsin probate procedure includes a meaningful feature for contested matters: under Wis. Stat. § 879.37, reasonable attorney fees may be awarded out of the estate to the prevailing party in appealable contested matters, and in defined circumstances to an unsuccessful will proponent or contestant who acted in good faith and is named to serve as personal representative. Fee awards are discretionary and fact-specific rather than automatic, but the provision can change the economics of pursuing or defending a probate claim.

Time limits in probate law are real, and delay can forfeit rights. If you are facing a contested estate, trust dispute, or guardianship challenge in Wisconsin, contact Gimbel, Reilly, Guerin & Brown at 414-271-1440 or through the firm’s contact form to schedule your consultation.

Frequently Asked Questions

Do I need a lawyer to contest a will in Wisconsin?

In practical terms, yes. Wisconsin requires the petitioner in a formal probate proceeding to be represented by an attorney, and contested matters generally proceed under formal administration. Beyond that requirement, undue influence and capacity claims turn on an evidence strategy, witness preparation, medical testimony, and familiarity with Wisconsin’s four-element and two-prong tests. These are litigated proceedings with real procedural requirements, and the party who has prepared the record is in a far stronger position.

How long does probate litigation take in Wisconsin?

Timelines vary by case complexity. A will contest turning on a single issue such as improper execution may resolve within several months through motion practice. Multi-party disputes involving trust breaches, asset tracing across accounts, or contested guardianships can take one to three years. GRGB pursues resolution efficiently while preparing every contested matter for trial.

What does it cost to litigate a probate case in Wisconsin?

Attorney fees vary based on the complexity of the dispute and the number of parties. Under Wis. Stat. § 879.37, reasonable attorney fees may be awarded out of the estate to the prevailing party in appealable contested matters, and to certain unsuccessful parties who acted in good faith. Because these awards are discretionary, they should be treated as a possibility rather than a plan. Schedule a consultation to discuss your situation and fee structure.

What is the deadline to contest a will after it’s admitted to probate in Wisconsin?

It depends on the proceeding and the order involved. Appeals from probate orders are governed by Wis. Stat. § 808.04, and the applicable period can turn on the type of order and whether written notice of entry was given. Raising an objection before a will is admitted is procedurally simpler than seeking relief afterward, and certain avenues narrow once an order is entered. If you have received notice of a probate proceeding and believe the will is invalid, act immediately rather than waiting to see how the administration unfolds.

Can GRGB represent both the person contesting a will and someone defending an estate?

Not in the same case. Across different matters, GRGB represents beneficiaries challenging estate plans, personal representatives defending wills, and trustees responding to breach claims. Working both sides in separate cases gives the firm perspective on how each position is built and where it is vulnerable.