Self-Proving Affidavits in Michigan Wills: Speeding Up the Probate Process

Current as of: September 19, 2026 Wills & Last Testaments Michigan
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Including a self-proving affidavit in your Michigan Last Will eliminates the need for your family to track down the original witnesses after your death. This simple notarized attachment, authorized by Mich. Comp. Laws § 700.2504, saves your heirs months of delay and expensive legal headaches in probate court.

When a loved one passes away, the last thing the grieving family wants is a bureaucratic nightmare at the courthouse. Yet, when a standard will is submitted to the Washtenaw County Probate Court, Ann Arbor or the Ingham County Probate Court, Lansing, the judge cannot simply take the document at face value. Historically, courts required the witnesses who originally signed the will to be located and brought in to testify (or submit sworn statements) that they indeed saw the deceased sign the document. If those witnesses have moved out of state or passed away, the probate process grinds to a halt.

To solve this problem, the Michigan legislature enacted Mich. Comp. Laws § 700.2504, which allows for a 'self-proving will.' A self-proving will includes a specific legal affidavit attached to the back of the document, signed by the testator and the two witnesses under oath, and stamped by a Notary Public. By completing this extra step during the signing ceremony, the document proves its own validity upon your death. Every modern will drafted by a competent estate planning attorney in Michigan should automatically include this vital component.

How to Fast-Track Your Will with a Self-Proving Affidavit

Understanding how an affidavit works, and how to execute it properly, is essential for a stress-free transition of your assets. The language must mirror the specific requirements of the Michigan Estates and Protected Individuals Code (EPIC).

How to Execute a Self-Proving Affidavit with a Notary

The process happens concurrently with the signing of your will. First, you and your two witnesses sign the main body of the will. Immediately following, you all turn to the self-proving affidavit page. The Notary Public will place you and the witnesses under oath. You will swear that this is your will and that you are signing it voluntarily. The witnesses will swear they watched you sign it and that you appeared to be of sound mind. All parties then sign the affidavit, and the notary applies their official stamp and signature. This sworn statement takes the place of live court testimony years later.

Can You Add an Affidavit to an Older Will?

If you look at your current will and realize it lacks a notary stamp or a self-proving affidavit, you do not necessarily need to rewrite the entire will. Under Michigan law, a will can be made self-proving at any time after its initial execution. You simply need to gather the original two witnesses who signed the document, sit down with a notary public, and execute the self-proving affidavit. The notary will attach it to the original will. If you cannot find the original witnesses, it is highly recommended to simply execute a brand new, updated will with a built-in affidavit.

Out-of-State Self-Proving Wills Moving to Michigan

Michigan has a large influx of retirees and professionals moving from other states. If you executed a self-proving will in Ohio or Florida and later move to Michigan, you may wonder if it is still valid. Under Mich. Comp. Laws § 700.2506, a written will is legally valid in Michigan if it was executed in compliance with the law of the jurisdiction where the testator was physically present when it was signed. Therefore, if your out-of-state self-proving affidavit met the requirements of that state, a Michigan probate court will generally accept it without issue.

How Much Does it Cost in Michigan?

Adding a self-proving affidavit is one of the most cost-effective legal strategies available. The immediate costs are negligible compared to the future savings:

ServiceTypical Cost in Michigan
Notary Public Fee$10 per notarial act (regulated by the state)
Attorney Drafting FeeIncluded in standard will packages ($500 to $1,500)
Probate Court SavingsSaves hundreds in legal fees by avoiding witness search petitions

How Long Does the Process Take?

For the testator, executing the affidavit adds perhaps 5 minutes to the will signing ceremony. However, the true time-saving benefit is felt by your family after your passing. When an executor files a Form PC 559, Michigan, State Court Administrative Office, Petition for Probate and/or Appointment of Personal Representative (Testate/Intestate) with a self-proving will, the court can admit the will immediately. Without it, the executor may spend 2 to 4 months trying to locate witnesses and file supplemental interrogatories with the court before the estate can even be opened.

Frequently Asked Questions (FAQ)

Does a self-proving affidavit prevent my will from being contested?

No. A self-proving affidavit only proves that the document was signed correctly according to statutory formalities. Family members can still contest the will on grounds of severe undue influence, fraud, or deep mental incapacity at the time of signing.

Do I still need two witnesses if I use a notary?

Absolutely. A notary public does not replace the requirement for two witnesses. The notary's job is strictly to administer the oath and verify the identities of you and your two witnesses for the affidavit.

What happens if the notary stamp expires before I die?

The affidavit remains perfectly valid. The probate court only looks at whether the notary's commission was active on the exact day the affidavit was signed and stamped.

Can a self-proving affidavit be used for a handwritten will?

While holographic (handwritten) wills do not strictly require witnesses in Michigan, if you choose to have witnesses sign your handwritten will, you can attach a self-proving affidavit to speed up its admission into probate court.


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