Will Execution Requirements in Iowa

At a glance

Requirements one by one

Governing law

Iowa's will rules are in the Probate Code, Chapter 633, Division VI. The section that controls how a will is signed is § 633.279. Iowa keeps the traditional, comparatively strict formalities: the will must be in writing, you must declare to your witnesses that it is your will, and two witnesses have to sign it in your presence and in each other's presence. Iowa has not adopted the Uniform Probate Code's more relaxed execution rules, does not recognize handwritten (holographic) wills, and has not enacted electronic wills.

Minimum age & capacity

"Any person of full age and sound mind" may make an Iowa will (§ 633.264). Full age is 18. The statute states only the "sound mind" requirement; Iowa courts fill in the details — you need enough mind and memory to understand that you are making a will, to know who your close family members are, and to know the general nature and extent of your property. Capacity is judged as of the moment you sign.

Writing & signature

The will must be in writing and signed by you, or by another person who writes your name "in the testator's presence and by the testator's express direction" if you cannot sign yourself (§ 633.279(1)). Iowa also requires something many states do not: publication. The will must be "declared by the testator to be the testator's will" — you have to tell the two witnesses, in some form, that the document they are signing is your will. They do not need to read it or know its contents, but they must understand that it is your will.

Witnesses required

An Iowa will needs two competent witnesses, and Iowa's presence rule is strict: each witness must sign "at the testator's request" and "in the presence of the testator and in the presence of each other" (§ 633.279(1)). Unlike states that let witnesses sign separately or within a reasonable time, Iowa expects the testator and both witnesses to be together for the signing. A witness must be at least 16 years old (§ 633.280). On interested witnesses, Iowa uses a partial "purging" rule: a gift to someone who also serves as a witness does not void the will, but that witness forfeits whatever part of the gift exceeds what they would have inherited had you died without a will — unless two disinterested witnesses also signed (§ 633.281). The clean fix is to use two witnesses who inherit nothing.

Notarization & self-proving

An Iowa will does not have to be notarized to be valid — a notary is not one of the two required witnesses. Where a notary comes in is the optional self-proving affidavit under § 633.279(2): you and your two witnesses swear before a notary, either when you sign the will or at any later date, using the statutory form. A self-proved will can then be admitted to probate without tracking down the witnesses to testify, which is why it is strongly recommended even though it is not required.

Handwritten (holographic) wills

Iowa does not recognize holographic wills. Every will made in Iowa must be witnessed under § 633.279, so a will you simply write out and sign by yourself, without witnesses, is not valid here — no matter how clearly it is in your handwriting. There is one indirect route: under the foreign-will statute (§ 633.283), a will that was validly executed under the law of the place where you made it, or of your domicile at the time, is honored in Iowa. So a handwritten will that was valid in a state that allows them can still be recognized after a move to Iowa.

Electronic & remote wills

Iowa does not permit electronic wills. It has not enacted the Uniform Electronic Wills Act or any state e-will statute, and § 633.279 requires two witnesses to sign in the physical presence of the testator and of each other. A will that exists only as a computer file, or that was witnessed only over a video call, is not valid in Iowa. Any temporary remote-witnessing measures used elsewhere during the COVID-19 pandemic were emergency actions, not permanent Iowa law.

Harmless-error / curative doctrine

Iowa has no harmless-error escape hatch. It has not adopted the Uniform Probate Code's rule (§ 2-503) that lets a court excuse a defect when the testator's intent is clear. Section 633.279 says a will, "to be valid, must" meet each of its formalities — the mandatory language courts read as strict compliance. A technical failure, such as only one witness or witnesses who did not sign in each other's presence, will generally void the will even if everyone agrees the person meant it as their will. This is the practical reason to follow the signing steps exactly.

What trips people up

The witnesses must all be in the room together. Iowa's presence rule is stricter than many states': both witnesses must sign in your presence and in each other's presence (§ 633.279(1)). Passing a will around to be signed by one witness at the office and another at home does not meet the rule, and because Iowa has no harmless-error doctrine, that kind of slip usually cannot be fixed later.

You have to say it is your will. Iowa requires publication — you must declare to the witnesses that the document is your will (§ 633.279(1)). Witnesses who sign a document without being told it is a will can create a gap in proving the will later. A short, clear statement at the signing avoids the problem.

A gift to a witness can be cut down. If someone who inherits under your will also serves as a witness, § 633.281 makes them forfeit whatever their gift exceeds their intestate share, unless two disinterested witnesses also signed. The will itself survives, but the interested witness can lose part of their inheritance. Use witnesses who take nothing under the will.

A handwritten note is not a valid Iowa will. Iowa does not accept holographic wills and has no harmless-error rule to rescue one. An unwitnessed handwritten document, however clear, generally leaves you with no valid will (unless it was validly executed under another state's law before you moved).

Common questions

Does my Iowa will have to be notarized? No. Iowa requires two witnesses, not a notary (§ 633.279(1)). Notarization only matters for the optional self-proving affidavit under § 633.279(2), which speeds up probate but never replaces the witnesses.

Can I handwrite my own will without witnesses? Not in Iowa. Iowa does not recognize holographic wills; every will must be witnessed by two people (§ 633.279). A handwritten will that was valid where you made it before moving to Iowa can still be honored, though (§ 633.283).

Can a family member who inherits be a witness? They can serve without invalidating the will, but it may cost them: § 633.281 makes an interested witness forfeit any gift beyond their intestate share unless two disinterested witnesses also signed. Use witnesses who inherit nothing.

Can I sign my will electronically or over video? No. Iowa has not adopted electronic wills, and § 633.279 requires two witnesses to sign in your physical presence and each other's. An electronic-only or video-witnessed will is not valid in Iowa.

Statutes and sources

• Iowa Code § 633.264 — who may make a will: any person of full age (18) and sound mind. https://www.legis.iowa.gov/docs/code/633.264.pdf (accessed 2026-07-11)
• Iowa Code § 633.279 — the execution rule: writing, signature, publication ("declared... to be the testator's will"), two witnesses signing in the presence of the testator and each other; plus the self-proving affidavit form. https://www.legis.iowa.gov/docs/code/633.279.pdf (accessed 2026-07-11)
• Iowa Code § 633.280 — competency of witnesses: a witness must be at least 16 and generally competent. https://www.legis.iowa.gov/docs/code/633.280.pdf (accessed 2026-07-11)
• Iowa Code § 633.281 — interested witnesses: a gift to a witness is not void, but the witness forfeits the excess over their intestate share unless two disinterested witnesses also signed. https://law.justia.com/codes/iowa/title-xv/chapter-633/section-633-281/ (accessed 2026-07-11)
• Iowa Code § 633.283 — a will validly executed under another state's or the testator's domicile's law is honored in Iowa (the foreign-will route for handwritten wills valid elsewhere). https://www.legis.iowa.gov/docs/code/633.283.pdf (accessed 2026-07-11)