Contesting a will in Michigan is a formal probate court proceeding in which an interested person asks the court to declare a deceased person’s will invalid, in whole or in part. The case is filed in the probate court of the county where the deceased was domiciled at death, and it is governed by Michigan’s Estates and Protected Individuals Code (EPIC). You need legal standing, a recognized ground, and enough evidence to carry the burden of proof, and you need to act before the estate is fully administered.
Who Can Challenge a Michigan Will
Only an “interested person” has standing to contest. MCL 700.1105 defines that term to include heirs, devisees, surviving spouses, creditors, beneficiaries, and anyone else with a property right in or claim against the estate.1Michigan Legislature. Michigan Compiled Laws 700.1105 – Definitions I to L In practice, two groups file most contests: heirs who would inherit under Michigan’s intestacy rules if the will were set aside, and beneficiaries named in a prior will whose share was cut or eliminated in the current one.
The requirement is a direct financial stake. You have to show that if the court rules in your favor, you personally gain something or avoid losing something. A relative who was never in line to inherit, whether through intestacy or an earlier will, cannot sustain a contest just because the document seems unfair. A fiduciary such as a guardian or trustee can bring a challenge on behalf of the interested person they represent.
Deadlines: When You Have to Act
Michigan does not post a single countdown like “90 days from the funeral.” The timing depends on where the probate case stands. An interested person can start a formal testacy proceeding by petitioning to set aside a will that has already been informally probated, or to block informal probate of a will whose application is pending.2Michigan Legislature. Michigan Compiled Laws 700.3401 – Formal Testacy Proceedings, Commencement The practical window closes once the estate is fully administered and the assets have been distributed.
Once a formal testacy order is entered, it becomes final as to every issue the court considered or could have considered. Vacating that order later is tightly limited. A petition to reopen is allowed in narrow circumstances, such as a later-discovered will whose proponents did not know of it during the earlier proceeding, and even then the petition must be filed before the earlier of the order approving final distribution or one year after the formal testacy order was entered.3Michigan Legislature. Michigan Compiled Laws 700.3412 – Formal Testacy Proceedings, Effect and Vacation If you suspect a will is invalid, act early. Waiting until the estate closes can permanently bar the claim.
Grounds That Will Hold Up in Court
A contest cannot rest on the feeling that the will is unfair. You have to prove the document is legally invalid on one or more recognized grounds.
Lack of Testamentary Capacity
Michigan requires that a testator be at least 18 and of sufficient mental capacity. The person must have been able to understand that they were disposing of property at death, know the nature and extent of what they owned, recognize the people who would naturally expect to inherit, and grasp the general effect of signing the document.4Michigan Legislature. Michigan Compiled Laws 700.2501 – Who May Make Will Capacity is judged at the exact moment the will was signed, not in general. Someone with a dementia or Alzheimer’s diagnosis can still execute a valid will during a lucid interval, so attorney observations, witness testimony, and medical records tied to that specific date carry more weight than a general diagnosis.
Undue Influence
Undue influence means someone in a position of trust or power over the testator pressured them so heavily that the will reflects the influencer’s wishes rather than the testator’s own. The typical setting involves a caregiver, family member, or advisor who isolated the testator, controlled access to information, or manipulated their emotions to secure a larger inheritance. Mere persuasion or suggestion is not enough. The testator’s independent judgment must have been overcome.
Fraud
A will produced through fraud is one where the testator was deliberately deceived, either about what the document said or about facts that shaped their choices. A classic example is telling someone they are signing a power of attorney when the document is actually a will, or lying about a family member’s conduct to convince the testator to disinherit that person. You have to show the testator relied on the false statements when making their decisions.
Improper Execution
Michigan has specific formalities for a valid will. A standard witnessed will must be in writing, signed by the testator (or by someone else at the testator’s direction and in their conscious presence), and signed by at least two witnesses, each of whom signs within a reasonable time after watching the testator sign or hearing the testator acknowledge the signature. Michigan also recognizes holographic wills, which are handwritten documents that are dated and have the testator’s signature and material provisions in their own handwriting.5Michigan Legislature. Michigan Compiled Laws 700.2502 – Execution, Witnessed Wills, Holographic Wills
A document that fails these requirements can be thrown out on technical grounds, but Michigan has a safety valve. Under the harmless error doctrine in MCL 700.2503, a court can still treat a non-compliant document as a valid will if the proponent proves by clear and convincing evidence that the deceased intended it to serve as their will.6Michigan Legislature. Michigan Compiled Laws 700.2503 That makes Michigan more forgiving than states that invalidate wills on strict technical defects.
What You Will Have to Prove
The person contesting the will carries the burden of proving it invalid. How heavy that burden runs depends on the ground. Lack of capacity and undue influence generally require a preponderance of the evidence, meaning it is more likely than not that the will is defective. Fraud and forgery require clear and convincing evidence, a higher standard.7Michigan Legislature. Michigan Compiled Laws 700.3407 – Formal Testacy Proceedings, Contested Cases
One shift matters. If the contestant establishes a presumption of undue influence, typically by showing the beneficiary stood in a fiduciary or confidential relationship with the testator and actively participated in preparing the will, the burden of producing evidence to rebut that presumption moves to the person defending the will. Reaching that presumption is often the central strategic goal in an undue influence case.
If the Will Has a No-Contest Clause
Some wills include a no-contest clause, sometimes called an in terrorem clause, that threatens to disinherit anyone who challenges the document. Michigan enforces these clauses with an important exception. Under MCL 700.2518, a no-contest penalty is unenforceable if the person who brought the contest had probable cause to do so. If you had a reasonable factual and legal basis for your challenge, you cannot be stripped of your inheritance for filing it, even if the contest ultimately fails.
How to File a Will Contest
A will contest takes the form of a formal testacy proceeding in the probate court of the county where the deceased was domiciled at death. If the deceased was not a Michigan resident but owned property in the state, venue lies in the county where that property was located.8Michigan Legislature. Michigan Compiled Laws 700.3201 – Venue for First and Subsequent Estate Proceedings
The Michigan State Court Administrative Office publishes the standard forms. To initiate formal probate, use the Petition for Probate and/or Appointment of Personal Representative (PC 559).9Michigan Courts. PC 559 – Petition for Probate and/or Appointment of Personal Representative To oppose probate of a will, file a general Objection (PC 694) stating the legal basis for your objection.10Michigan Courts. PC 694 – Objection
As of February 2025, the filing fee for a petition for probate or appointment of a personal representative is $150. Additional motions, petitions, objections, or claims filed after the initial proceeding carry a $20 motion fee, with no motion fee charged when the moving party is the subject of the proceeding.11Michigan Courts. Probate Court Fee Tables February 2025 Fee waivers are available for those who qualify financially.
After the court accepts the filing, you must serve notice on every interested party, including heirs, devisees, and any nominated personal representative. Michigan court rules generally allow service by personal delivery or mail, and proof of service must be filed with the court. Failing to properly notify every interested person can delay the proceedings or get the contest dismissed.
The Evidence That Decides These Cases
Will contests turn on evidence. Before you file, gather what supports your specific ground.
- For capacity claims, medical records near the date of execution are the foundation. Physician evaluations, cognitive test results, hospital records, and pharmacy records showing medications that affect mental function all help establish whether the testator could make a will on that day.
- For undue influence claims, correspondence between the testator and the alleged influencer, including emails, text messages, and letters, can show isolation, dependency, or pressure. Financial records revealing unusual transactions, beneficiary changes, or property transfers around the time the will was changed are also relevant.
- For fraud claims, you need evidence that the testator was given false information, such as forged documents, misleading letters, or testimony from witnesses to the deception.
- For improper execution claims, the will itself is the key exhibit. Witness affidavits, or the absence of them, and testimony from the drafting attorney about the signing can establish whether the formalities were met.
Digital evidence matters more every year. Text messages, emails, and social media posts can reveal the testator’s state of mind or document the behavior of someone accused of exerting undue influence. Preserve complete email chains with headers and keep original exports of text messages with timestamps rather than cropped screenshots.
What Happens If You Win
If the court declares the contested will invalid, the estate does not evaporate. The court looks for the next valid governing document. If the deceased had a prior will that was never properly revoked, the estate passes under that earlier will. If no prior valid will exists, the estate is distributed according to Michigan’s intestacy statutes, which prioritize the surviving spouse and descendants and then extend outward to parents, siblings, and more distant relatives.
A formal testacy order determining that the deceased left no valid will is final and settles both the validity question and the identification of heirs. If a previously unknown will later surfaces, the court may consider a petition to modify its order, provided the proponents of the newly discovered will did not know of it during the earlier proceeding.3Michigan Legislature. Michigan Compiled Laws 700.3412 – Formal Testacy Proceedings, Effect and Vacation
What a Contest Costs and What You Risk
Will contests are expensive. Attorney fees for probate litigation typically run from $200 to $800 per hour, and total costs for a contested case can range from a few thousand dollars to well over $25,000 depending on complexity, expert witnesses, and whether the case reaches trial. Medical expert testimony on testamentary capacity, when needed, often runs $350 to $500 per hour. Filing fees, service costs, and the expense of obtaining medical records add up before the first hearing.
There is a real downside if the contest lacks merit. A Michigan court can award costs and reasonable attorney fees to the prevailing party if it finds the losing party’s action was frivolous, meaning there was no reasonable factual or legal basis for the claim, or the primary purpose was to harass or embarrass.12Michigan Legislature. Michigan Compiled Laws 600.2591 – Frivolous Actions and Defenses Combined with the no-contest clause risk, that makes an honest legal assessment worthwhile before filing.
Mediation as an Alternative
Not every will dispute needs a trial. Mediation is a common option in Michigan probate disputes, and many probate judges encourage or order it. A neutral third party, often a retired judge or experienced probate attorney, works with the parties to negotiate a settlement. The process is private, which keeps family financial matters and personal grievances out of the public record.
Mediation can address the same issues a contest raises, including disputes over asset distribution, concerns about executor conduct, and allegations of incapacity or undue influence. Parties can agree to divide assets in ways a court might not have authority to order, and because everyone helps craft the agreement, compliance tends to be higher than with a court-imposed outcome. A signed settlement is generally binding, though the court must approve any agreement affecting administration of the estate. Mediation is not right for every case, particularly where fraud or forgery is alleged, but for family disputes driven by grief and misunderstanding it can resolve things faster and at far lower cost than a full trial.