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Idaho Will Requirements
Pillar GuideIdaho16 min read

Idaho Will Requirements

Idaho wills require a writing, testator signature, and two adult witnesses. Handwritten and electronic wills are valid.

By Settled Editorial

An Idaho will has to be in writing, signed by the testator or in the testator's name by someone else in the testator's presence and by the testator's direction, and signed by at least two witnesses. Idaho Code 15-2-502 sets all three steps. Idaho also accepts a handwritten will with no witnesses, and since 2023 it accepts an electronic will.

The rules sit in Title 15 of the Idaho Code, the Uniform Probate Code, in chapter 2. Sections 15-2-501 through 15-2-513 cover who may make a will, how it is signed, who may witness, and how it is revoked. Sections 15-2-1101 through 15-2-1111 hold the Uniform Electronic Wills Act, and 15-2-1001 sets up a will registry at the Secretary of State. Every rule below was read on the Idaho Legislature's own section pages, each of which prints its amendment history at the foot of the text.

Read this page as a planning map rather than a signing kit. It is general information about Idaho law, not advice about your estate. Ask a licensed Idaho attorney to look at any plan that involves land, community property, a blended family, or a dispute you can already see forming.

A valid will does not keep an estate out of court. It names who inherits and who serves as personal representative (the executor), and the estate still moves through the district court process in the Idaho probate guide. When no valid will exists, what happens with no will is set by Idaho's intestacy statutes instead.

Who Can Make an Idaho Will

Idaho Code 15-2-501 draws the line in one sentence. Any emancipated minor, or any person 18 or more years of age, who is of sound mind may make a will.

Two details matter here.

  • An emancipated minor qualifies. The age floor of 18 does not apply to a younger person who has been emancipated.
  • The statute does not define sound mind. Section 15-2-501 uses the phrase and stops there. The self-proving affidavit in 15-2-504 has the testator swear to being 18 or older, of sound mind, and under no constraint or undue influence, which is the same test restated as a sworn fact.

The second sentence of 15-2-501 matters in a community property state. It says a married woman may dispose of her property, whether separate or community, in the same manner as any other person, subject to the restrictions in the code. A will reaches only what the testator owns, so which half of the marital property belongs to whom is a separate question from whether the will is valid.

What Makes an Idaho Will Valid

Idaho Code 15-2-502 opens with its exceptions: holographic wills, the separate personal-property writings of 15-2-513, wills valid under the choice-of-law rule in 15-2-506, and signatures made under 51-109. Outside those, every will shall be:

  1. In writing.
  2. Signed by the testator, or in the testator's name by some other person in the testator's presence and by the testator's direction.
  3. Signed by at least two persons, each of whom witnessed either the signing or the testator's acknowledgment of the signature or of the will.

Here is why the third item deserves a slow read. It is shorter than most people expect.

The witnesses do not have to watch the pen move. A witness qualifies by seeing the testator sign, or by hearing the testator acknowledge the signature, or by hearing the testator acknowledge the will. A will the testator signed earlier can still be witnessed when the testator acknowledges it.

Section 502 sets no timing or presence rule for the witnesses' own signatures. It does not say the witnesses must sign in the testator's presence, in each other's presence, or within any stated time. Idaho's electronic-will section, 15-2-1105, does add a "within a reasonable time" limit, so the gap in the paper rule stands out. The self-proving affidavit, though, has each witness swear to signing "in the presence and hearing of the testator." Anyone planning to make the will self-proved should have everyone sign at one sitting, because that is what the affidavit says happened.

Signing for Someone Who Physically Cannot

Idaho Code 51-109 is the notary statute's rule for a person physically unable to sign. That person may direct someone other than the notary public to sign the person's name, and the notary adds a notation such as "Signature affixed by (name of other individual) at the direction of (name of individual)." Section 15-2-502 lists 51-109 as an exception, and 15-2-504(3) says a will may be executed and made self-proved in compliance with 51-109.

Idaho Offers No Notary-Only Route

Some states accept a will that the testator merely acknowledged before a notary, with no witnesses. Idaho does not. Section 15-2-502 lists a writing, a signature and two witness signatures. A notary appears only in the self-proving step, covered below.

Who Can Witness an Idaho Will

Idaho Code 15-2-505 runs two subsections.

  • (a) Age and competence. Any person 18 or more years of age generally competent to be a witness may act as a witness to a will.
  • (b) Interested witnesses. A will or any provision of it is not invalid because the will is signed by an interested witness.

So a beneficiary who signs as a witness keeps the gift. Idaho carries no purging rule. Even so, two adult witnesses who inherit nothing take away the easiest undue-influence argument a relative can raise, and finding them costs little. What that argument looks like in court is covered in how an Idaho will gets challenged.

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Handwritten Wills Are Valid in Idaho

Idaho Code 15-2-503 recognizes holographic wills in one sentence. A will that does not comply with 15-2-502 is valid as a holographic will, whether or not witnessed, if the signature and the material provisions are in the handwriting of the testator.

Three points decide whether a handwritten page qualifies.

  • The material provisions must be handwritten. Who gets what has to be in the testator's own hand.
  • The signature must be handwritten. A typed name does not satisfy the section.
  • No date, no witnesses, no notary. Section 15-2-503 asks for none of them.

That short list is also why these documents draw fights. Handwriting comparisons, missing pages and unclear wording produce litigation that a typed will signed before two witnesses avoids.

Idaho Has No Harmless Error Rule

Some states, Utah among them, let a court accept a flawed will when clear and convincing evidence shows the person meant it as a will. The Idaho Code contains no such rule. The will sections of chapter 2 run from 15-2-501 to 15-2-513 with no dispensing section among them, and when Idaho enacted the Uniform Electronic Wills Act it left out the uniform act's harmless-error section: the legislature's page for 15-2-1106 returns "not found."

The practical result is blunt. A typed will with one witness signature does not meet 15-2-502 and is not handwritten, so 15-2-503 cannot save it either. Get the formalities right at signing, because Idaho gives a court no statutory tool to forgive a miss.

Self-Proved Wills, and What They Buy

Idaho Code 15-2-504 offers two routes to a self-proved will.

  • At signing, under subsection (1). The testator acknowledges the will and the witnesses give affidavits before an officer authorized to administer oaths where the signing happens, evidenced by the officer's certificate under official seal. The statute prints the form.
  • Later, under subsection (2). An already-attested will can be made self-proved at any time by the same acknowledgment and affidavits, with the certificate attached to or annexed to the will.

The payoff arrives at probate. Idaho Code 15-3-406(b) says that if a will is self-proved, compliance with the signature requirements is conclusively presumed, and the other requirements of execution are presumed subject to rebuttal, without the testimony of any witness, unless there is proof of fraud or forgery. Without the affidavit, 15-3-406(a) requires the testimony of at least one attesting witness in a contested case if one within the state is competent and able to testify.

A self-proving affidavit is optional. A will signed correctly without one is still valid. It simply spares the family from finding a witness years later, when one has moved away and the other has died.

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Idaho Recognizes Electronic Wills

Idaho adopted the Uniform Electronic Wills Act as sections 15-2-1101 through 15-2-1111, added by 2023 session law chapter 104. Section 15-2-1111 applies the act to the will of a decedent who dies on or after January 1, 2020, and 15-2-1103 says an electronic will is a will for all purposes of Idaho law.

Idaho Code 15-2-1105(1) sets the execution rules. An electronic will must be:

  1. A tamper-evident electronic record that is readable as text at the time of signing. Section 15-2-1102(8) defines tamper-evident as a feature that preserves evidence of any change to the record.
  2. Signed by the testator, or by another individual in the testator's name, in the testator's physical presence, and by the testator's direction.
  3. Signed by at least two witnesses in the physical or electronic presence of the testator, each of whom is a resident of a state at the time of signing, within a reasonable time after witnessing the signing or the testator's acknowledgment.

Let's break down the differences from a paper will. A witness can join by live video, because 15-2-1102(3) defines electronic presence as individuals in different locations communicating in real time through communication technology. A proxy signer cannot, because the electronic-will section requires the testator's physical presence for that step. And each witness must be a resident of a state, which 15-2-1102(7) defines as a U.S. state, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, a U.S. territory, or a federally recognized Indian tribe.

Four neighboring sections finish the act.

  • Self-proving works, once. Section 15-2-1108 lets an electronic will be executed, attested and made self-proved at the same time under 15-2-504(1), with "physical or electronic presence" allowed in the witness affidavit. Subsection (2) says the later self-proving route in 15-2-504(2) does not apply to an electronic will.
  • Revocation by physical act needs proof. Section 15-2-1107 lets a later will revoke an electronic will, or lets a physical act do it if a preponderance of the evidence shows the testator performed it, or directed someone in the testator's physical presence to perform it, with intent to revoke.
  • A paper copy can be certified. Section 15-2-1109 lets anyone create a certified paper copy by affirming under penalty of perjury that it is a complete, true and accurate copy. A petition to probate an electronic will must state that the filed will is tamper-evident and include every attached record or explain what is missing.
  • Another state's law can save it. Section 15-2-1104 recognizes an electronically executed will that misses 15-2-1105(1) if it complied with the law where the testator was physically located at signing, or where the testator was domiciled or resided at signing or at death.

A Will Signed in Another State

Idaho Code 15-2-506 keeps most out-of-state wills valid after a move. A written will is valid if it meets 15-2-502 or 15-2-503, or if its execution complies with the law, at the time of execution, of the place where it was executed, or of the place where the testator was domiciled, had a place of abode or was a national, either at execution or at death.

A will signed under Oregon or Utah rules does not need re-signing after a move to Boise. The same door lets in a will made valid somewhere else on terms Idaho would not apply on its own.

The Separate List for Personal Items

Idaho Code 15-2-513 lets a will refer to a written statement or list that disposes of tangible personal property the will does not otherwise dispose of. The list has to be in the testator's handwriting or signed by the testator, and it has to describe the items and the people receiving them with reasonable certainty.

The section excludes money, evidences of indebtedness, documents of title, securities, and property used in trade or business. Furniture, jewelry and tools fit. The list may be written before or after the will and changed later without re-signing the will.

Revoking or Changing an Idaho Will

Idaho Code 15-2-507 gives two methods. A later will can revoke the earlier one expressly or by inconsistency. Or the will can be burned, torn, canceled, obliterated or destroyed, with the intent and for the purpose of revoking it, by the testator or by another person in the testator's presence and by the testator's direction. A will signed in duplicate is revoked by revoking one of the copies.

Divorce does part of the work automatically. Idaho Code 15-2-508 says a divorce or annulment after signing revokes gifts to the former spouse, powers of appointment given to the former spouse, and the former spouse's nomination as executor, trustee, conservator or guardian, unless the will expressly says otherwise. A decree of separation that does not end the marriage is not a divorce for this purpose, and no other change of circumstances revokes a will.

Reviving an old will takes care. Under 15-2-509, if a second will is revoked by a physical act, the first will stays revoked unless the circumstances or the testator's declarations show the testator meant it to take effect. If a third will revokes the second, the first will stays revoked except to the extent the third will shows otherwise. Republishing a revoked will revives it.

The Idaho Will Registry

Idaho Code 15-2-1001 directs the Secretary of State to keep a will registry. It holds three facts: the full name of the person making the will, the date the will was made, and where the will is kept. It does not hold a copy of the will.

The rules around it are narrow on purpose.

  • The fee is $10.00, set by the statute.
  • Registration is optional. Failing to register has no effect on the will's validity, and a registration or its absence is not evidence in any proceeding about the will.
  • Only interested persons or their attorneys may search it. The Secretary of State's page asks a searcher to certify interested-person status on its Request Will Information Form and email it in. The office also offers online registration and a printable registration form.

For a family, the registry answers one question after a death: did the person file a note saying where the will is? That is useful when the original has gone missing.

After a Death: Getting the Will to Court

Idaho Code 15-2-902 puts a duty on whoever holds the original. After the testator dies, a person having custody of the will shall deliver it with reasonable promptness to someone able to secure its probate, and if none is known, to an appropriate court. A person who willfully fails to deliver it is liable for resulting damages, and one who refuses after a court order faces contempt.

Next steps for the named personal representative are in Idaho executor duties. A will is also only one document of several; the financial and health care documents are covered in the rest of an Idaho plan. And because a will alone does not avoid probate, how to avoid probate in Idaho covers the trust and survivorship options.

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Information current as of September 24, 2026

Settled Estate is not a law firm, and this content is for informational purposes only and does not constitute legal advice. Probate laws and procedures in Idaho can change. Consult with a qualified attorney for advice specific to your situation. Full disclaimer.

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