Will Requirements in Missouri
Missouri requires every will to be in writing, signed by the testator, and attested by two competent witnesses, allows self-proved wills, and has no holographic will exception.
Last checked . General information, not legal advice.
Missouri at a glance
- Witnesses
- 2 witnesses
- Self-proving affidavit
- Allowed
- Handwritten (holographic) wills
- Not recognized
The rules in Missouri
How many witnesses does a will need in Missouri?
A will in Missouri must be signed in front of two witnesses, who sign it too.
Can a will be self-proved in Missouri?
Yes. Missouri allows a self-proving affidavit, which lets a court accept the will without calling the witnesses to testify.
Is a handwritten will valid in Missouri?
No. Missouri does not recognize unwitnessed handwritten wills made under its own law.
Where do the Missouri rules for wills come from?
They come from RSMo 474.320 and RSMo 474.337 Written will self-proved, how. We last checked them in October 2026. Laws change, so check the current statute before you rely on it.
How Missouri compares
27 jurisdictions recognize handwritten wills; Missouri is not one of them, so a will made there should be witnessed.
What this means in practice
Sign the will in front of all the witnesses at the same time and have them sign right after you. Many people choose adult witnesses who receive nothing under the will, which avoids questions later.
Keep the signed original somewhere safe and tell your executor where it is. A copy is usually not enough to probate a will.
Changing a will later takes the same formalities: sign a codicil or a new will with witnesses, rather than writing changes on the original.
General information, not legal advice. Laws change, and cities can add their own rules, so check the current statute before you rely on it.