New Mexico: Will Execution Requirements

Requirements one by one

Governing law

New Mexico's will-execution rules are in the New Mexico Uniform Probate Code, Chapter 45,
Article 2, Part 5. The core statute is § 45-2-502 (writing, signature, two witnesses);
§ 45-2-501 says who may make a will; § 45-2-504 provides the self-proving affidavit;
§ 45-2-505 handles a witness who is also a beneficiary; and § 45-2-506 recognizes wills
executed in other states. New Mexico is a Uniform Probate Code state, but it made two
notable choices: it never adopted a holographic-will provision, and it left § 45-2-503 —
the slot the UPC uses for its harmless-error rule — "Reserved." So New Mexico is a UPC
state without holographic wills and without a harmless-error escape hatch. It is not a
civil-law "notarial will" state, and it has not adopted electronic wills.

Minimum age & capacity

An "individual eighteen or more years of age who is of sound mind or an emancipated minor
who is of sound mind may make a will" (§ 45-2-501). New Mexico is one of the states that
expressly lets an emancipated minor make a will; otherwise the maker must be at least 18.
The statute does not define "sound mind"; New Mexico courts supply the test — you must
know that you are making a will, know the character and extent of your estate, and know
the natural objects of your bounty (your heirs). Capacity is judged at the moment of
signing.

Writing & signature

A New Mexico will must be in writing and "signed by the testator or in the testator's name
by some other individual in the testator's conscious presence and by the testator's
direction" (§ 45-2-502(B)). If you cannot sign yourself, someone may sign for you, but
only in your "conscious presence" — meaning you are aware the signing is happening — and
at your direction. New Mexico does not require the signature to appear at the end of the
document.

Witnesses required

New Mexico's witness rule is one of the strictest among Uniform Probate Code states. A
will must be "signed by at least two individuals, each of whom signed in the presence of
the testator and of each other after each witnessed the signing of the will" (§ 45-2-502(C)).
Read that closely: both witnesses have to actually watch you sign (or watch the proxy sign
at your direction), and then each must sign the will while both you and the other witness
are present. New Mexico does not give the looser options many UPC states allow — there is
no "or acknowledgment of the signature" alternative and no "within a reasonable time"
window to sign later. Everyone is together, and the witnesses see the signing.

On interested witnesses, New Mexico follows the modern UPC rule: "the signing of a will by
an interested witness does not invalidate the will or any provision of it" (§ 45-2-505(B)).
A beneficiary who also witnesses does not lose the gift and does not trigger a presumption
of undue influence — a real difference from states with purging statutes. Using
disinterested witnesses is still the cleaner practice, but New Mexico imposes no penalty.

Notarization & self-proving

A New Mexico will does not have to be notarized to be valid — a notary is not one of the
two required witnesses. What a notary supports is the self-proving affidavit under
§ 45-2-504. A will may be made self-proved at the time of signing, or at any later time,
by the testator's acknowledgment and the witnesses' sworn affidavits (or affirmations
under penalty of perjury) before an officer authorized to administer oaths, in the
statutory form. New Mexico adds a useful backstop: a signature on the self-proving
affidavit "is considered a signature affixed to the will if necessary to prove the will's
due execution" (§ 45-2-504(C)). A self-proved will can be admitted without the witnesses
appearing in court.

Handwritten (holographic) wills

New Mexico does not recognize holographic wills. The execution statute (§ 45-2-502)
requires two witnesses and contains no holographic provision, so a will written out and
signed entirely by hand, with no witnesses, is not valid if it is made in New Mexico.
National articles and will templates frequently get this wrong, because roughly half the
states do allow holographic wills — New Mexico is one that does not. One qualification
matters: under § 45-2-506, New Mexico honors a written will that was validly executed
where it was signed, or under the law of the place where the testator is domiciled, has a
place of abode, or is a national. So a handwritten will that was valid in the state where
it was made can still be given effect in New Mexico after a move, even though New Mexico
would not let you create one here.

Electronic & remote wills

New Mexico does not permit electronic wills. It has not enacted the Uniform Electronic
Wills Act or any electronic-wills statute, so § 45-2-502's requirement of a physically
signed writing, witnessed by two people signing in the testator's and each other's
presence, still controls. A will that exists only as a computer file, or that was "signed"
by typing a name or witnessed only over video, is not a valid New Mexico will.

Harmless-error / curative doctrine

New Mexico has no harmless-error rule. Although it adopted the Uniform Probate Code, it
left § 45-2-503 — the section the UPC uses for harmless error — "Reserved," and never
enacted a substantial-compliance cure. Section 45-2-502 states the requirements in
mandatory terms ("a will must be" in writing, signed, and witnessed), so a will with a
witnessing or signature defect generally cannot be saved by proving after the fact that
you meant it as your will. New Mexico is a strict-compliance state, which makes its exact
witnessing rule all the more important to follow.

What trips people up

Notarizing a will is not the same as witnessing it. Taking a typed will to a notary
does not satisfy § 45-2-502, which requires two witnesses who watch you sign. Notarization
matters only for the optional self-proving affidavit under § 45-2-504.

The witnesses must actually watch you sign — together. New Mexico does not allow the
"acknowledgment" shortcut some states permit. Under § 45-2-502(C), both witnesses must
witness the signing itself and sign in the presence of you and of each other. Gathering
witness signatures one at a time, or having a witness sign based only on your later say-so
that the signature is yours, does not meet New Mexico's rule — and with no harmless-error
doctrine, there is no second chance.

A handwritten will alone does not work in New Mexico. Unlike about half the states,
New Mexico does not recognize holographic wills. Writing your wishes out by hand and
signing them, with no witnesses, leaves no valid New Mexico will (though a handwritten
will you validly made in another state may still be honored under § 45-2-506).

A beneficiary can witness without penalty — but it still invites a fight. New Mexico
does not void a gift to a witness or presume undue influence (§ 45-2-505), unlike purging
states. Even so, using two disinterested witnesses avoids handing a will contestant an
easy argument about pressure or interest.

Common questions

Does my New Mexico will have to be notarized? No. New Mexico requires two witnesses,
not a notary (§ 45-2-502). Notarization only supports the optional self-proving affidavit
under § 45-2-504, which speeds up probate but never replaces the witnesses.

Can I handwrite my own will without witnesses? No. New Mexico does not recognize
holographic wills — a New Mexico will needs two witnesses who watch you sign (§ 45-2-502).
A handwritten, unwitnessed will made here is not valid.

Can I sign my New Mexico will online or over video? No. New Mexico has not adopted
electronic wills, so a will must be a physical signed writing witnessed in person by two
people (§ 45-2-502). Signing electronically or witnessing by video does not make a valid
New Mexico will.

Can a beneficiary be one of my witnesses? Yes, without losing their gift — New Mexico
says an interested witness does not invalidate the will or any provision (§ 45-2-505). But
using two disinterested witnesses is still the safer practice if a dispute is possible.

Statutes and sources

• N.M. Stat. Ann. § 45-2-501 — who may make a will: an individual 18 or older, or an emancipated minor, of sound mind.
  https://law.justia.com/codes/new-mexico/chapter-45/article-2/part-5/section-45-2-501/ (accessed 2026-07-11)
• N.M. Stat. Ann. § 45-2-502 — core execution: writing; signature (or a proxy in the testator's conscious presence); two witnesses who each watch the signing and sign in the presence of the testator and each other.
  https://law.justia.com/codes/new-mexico/chapter-45/article-2/part-5/section-45-2-502/ (accessed 2026-07-11)
• N.M. Stat. Ann. § 45-2-503 — "Reserved" (New Mexico did not adopt the UPC's harmless-error rule).
  https://law.justia.com/codes/new-mexico/chapter-45/article-2/part-5/section-45-2-503/ (accessed 2026-07-11)
• N.M. Stat. Ann. § 45-2-504 — self-proving affidavit, executed at signing or later; a signature on it counts as a signature on the will if needed to prove execution.
  https://law.justia.com/codes/new-mexico/chapter-45/article-2/part-5/section-45-2-504/ (accessed 2026-07-11)
• N.M. Stat. Ann. § 45-2-505 — who may witness: any competent person; the signing by an interested witness does not invalidate the will or any provision.
  https://law.justia.com/codes/new-mexico/chapter-45/article-2/part-5/section-45-2-505/ (accessed 2026-07-11)
• N.M. Stat. Ann. § 45-2-506 — choice of law: a written will valid where executed or under the testator's domicile/abode/nationality law is valid in New Mexico.
  https://law.justia.com/codes/new-mexico/chapter-45/article-2/part-5/section-45-2-506/ (accessed 2026-07-11)