Will Execution Requirements in Wisconsin

At a glance

Requirements one by one

Governing law

Wisconsin's will-execution rules are in Chapter 853 of the statutes. Section 853.01 says who may make a will, § 853.03 sets the writing, signature, and witness rules (and, since a recent update, allows remote audio-video witnessing), § 853.04 provides the optional self-proved will, § 853.05 honors wills validly signed elsewhere, and § 853.07 covers who may witness and the effect of a witness who also inherits. Wisconsin uses the traditional attested will but with the modern "reasonable time" witnessing rule. It recognizes no handwritten (holographic) will, has not adopted a fully electronic (paperless) will, and has no harmless-error rule to excuse a botched signing.

Minimum age & capacity

To make a Wisconsin will you must be "of sound mind 18 years of age or older" (§ 853.01). The age floor is a flat 18, with no marriage or military exception. "Sound mind" is the ordinary testamentary-capacity standard: at the time of signing you understand that you are making a will, know in a general way what you own, and know the people who would normally inherit from you.

Writing & signature

Every will "must be in writing" (§ 853.03). You meet the signature step by signing it yourself, by signing "with the assistance of another person with the testator's consent," or by having another person sign your name "at the testator's direction and in the testator's conscious presence" (§ 853.03(1)). Wisconsin has no rule that the signature appear at the very end of the document.

Witnesses required

A Wisconsin will needs at least two witnesses, and the timing rule is the modern, forgiving one. Each witness must sign "within a reasonable time" after you sign the will, or after you acknowledge your signature or the will, "in the conscious presence of the witness" (§ 853.03(2)(am)). Two features stand out: the witnesses do not have to sign at the exact moment you do — a reasonable time later is fine — and the "2 witnesses… may observe the signing or acknowledgement… at different times" (§ 853.03(2)(bm)). "Conscious presence" means the witness is aware, through sight, hearing, or general awareness, that you are signing. Any person competent to testify may serve as a witness (§ 853.07(1)).

The interested-witness rule is a partial "purge." A gift to a witness (or the witness's spouse) does not invalidate the will, but under § 853.07(2)(b) it is "invalid to the extent" it exceeds what that person would have inherited in intestacy — unless the will is also signed by two disinterested witnesses, or there is "sufficient evidence that the testator intended the full transfer" (§ 853.07(2)(c)). Using two disinterested witnesses avoids the issue.

Notarization & self-proving

A Wisconsin will does not have to be notarized to be valid — a notary is not one of the two required witnesses. What notarization powers is the optional self-proved will. Under § 853.04 the testator and witnesses swear an affidavit before an officer authorized to administer oaths (a notary), certified under official seal. Wisconsin offers two paths: a "one-step" affidavit signed at the same time the will is executed, and a "two-step" affidavit added at any later date. A self-proved will can be admitted to probate without bringing the witnesses in to testify, but the affidavit is a convenience, not a validity requirement.

Handwritten (holographic) wills

Wisconsin does not recognize holographic wills. Section 853.03 requires every will to be in writing AND signed by at least two witnesses, with no exception for a will in the testator's own handwriting. A handwritten page signed with no witnesses is not a valid Wisconsin will. The exception runs the other way: under § 853.05, a will validly executed under the law of the place where you signed it, or where you resided or were domiciled — including a holographic will from a state that allows them — is honored in Wisconsin.

Electronic & remote wills

Wisconsin splits the difference on modern execution. It does allow remote witnessing: the two witnesses may appear by "simultaneous remote appearance by 2-way, real-time audiovisual communication technology" (§ 853.03(2)(c)) — but only if the signing is supervised by a Wisconsin-licensed attorney, the testator and both witnesses are physically located in Wisconsin, everyone identifies themselves (showing photo ID if not already known), and the signed paper original is then delivered or mailed to the witnesses and the supervising attorney, who prepares an affidavit of compliance. What Wisconsin has not done is authorize a fully electronic, paperless will signed with an electronic signature. The will itself remains a signed paper document; only the witnessing can happen over video.

Harmless-error / curative doctrine

Wisconsin is a strict-compliance state. Section 853.03 says a will "must be… executed with all of the following formalities," and there is no harmless-error or substantial-compliance statute, so a will that misses one — for example, only one witness — is invalid, no matter how clearly it reflects the testator's wishes. Wisconsin's flexibility is built into the witnessing rules instead (reasonable time, conscious presence, witnesses at different times), not into an after-the-fact rescue. A will valid where it was executed is honored under § 853.05.

What trips people up

Wisconsin has no handwritten-will option. A signed note in your own handwriting is not a valid will here — Wisconsin requires two witnesses (§ 853.03). Because there is no harmless-error rule, a court cannot rescue an unwitnessed handwritten will made in Wisconsin.

"Reasonable time" is flexible, but do not push it. The witnesses can sign a reasonable time after you do, and even at different times from each other (§ 853.03(2)(am)-(bm)). That flexibility is real, but the safe practice is still to have both witnesses sign promptly, in your presence, while everyone remembers the event.

Remote witnessing is lawyer-supervised, not casual video. Wisconsin allows witnessing by live two-way video, but only under § 853.03(2)(c): a supervising Wisconsin attorney, the testator and witnesses all physically in Wisconsin, identity checks, and a signed paper original mailed around and an affidavit of compliance. A quick unsupervised video call does not meet the statute.

A gift to a witness can be cut down. Under § 853.07(2), if a beneficiary also serves as a witness, the gift is invalid to the extent it exceeds their intestate share, unless two disinterested witnesses also signed or there is clear evidence the testator meant the full gift. Use two witnesses who inherit nothing.

Common questions

Does my Wisconsin will have to be notarized? No. Wisconsin requires two witnesses, not a notary (§ 853.03). Notarizing the optional self-proving affidavit (§ 853.04) just lets the will be admitted to probate without calling the witnesses to testify; it is not required for the will to be valid.

Can I write my Wisconsin will by hand? You can write it by hand, but it still needs two witnesses — Wisconsin does not recognize an unwitnessed handwritten (holographic) will (§ 853.03). If you already signed a valid holographic will in a state that allows them, Wisconsin will honor it under § 853.05.

Can my witnesses sign later, or over video? A reasonable time later is fine, and even at different times (§ 853.03(2)(am)-(bm)). Video witnessing is allowed only under the supervised remote process in § 853.03(2)(c) — a Wisconsin attorney, everyone located in Wisconsin, and a signed paper original. A fully electronic, paperless will is not valid in Wisconsin.

Can a beneficiary be one of my witnesses? It is risky. Under § 853.07(2) the witness's gift can be reduced to their intestate share unless two disinterested witnesses also signed or the testator's full intent is clearly proved. The clean fix is to use two witnesses who are not beneficiaries.

Statutes and sources

• Wis. Stat. § 853.01 — capacity: any person of sound mind 18 or older may make and revoke a will. https://docs.legis.wisconsin.gov/document/statutes/853.01 (accessed 2026-07-11)
• Wis. Stat. § 853.03 — core execution: writing, testator's signature, two witnesses signing within a reasonable time in conscious presence; remote audio-video witnessing. https://docs.legis.wisconsin.gov/document/statutes/853.03 (accessed 2026-07-11)
• Wis. Stat. § 853.04 — optional self-proved will by affidavit before an officer authorized to administer oaths (one-step or two-step). https://docs.legis.wisconsin.gov/document/statutes/853.04 (accessed 2026-07-11)
• Wis. Stat. § 853.05 — a will validly executed under the law of the place of signing or the testator's residence/domicile is honored in Wisconsin. https://docs.legis.wisconsin.gov/document/statutes/853.05 (accessed 2026-07-11)
• Wis. Stat. § 853.07 — who may witness; a gift to an interested witness is invalid beyond their intestate share unless two disinterested witnesses sign or intent is clearly shown. https://docs.legis.wisconsin.gov/document/statutes/853.07 (accessed 2026-07-11)