Missouri: will and trust rules
How many witnesses a will needs, whether a handwritten (holographic) will is valid, and whether the state has adopted the Uniform Trust Code.
From a statute-cited table| Witnesses needed | 2 |
|---|---|
| Handwritten (holographic) will | Not valid |
| Uniform Trust Code adopted? | Yes |
| Law | RSMo 474.320 |
Most states also let you add a self-proving affidavit, signed before a notary, so witnesses do not have to testify in probate. California and Ohio have no self-proving affidavit, and Maryland has none for a paper will witnessed in person.
General information only, not legal, insurance or financial advice. Not affiliated with any government agency. Exceptions can apply. Confirm with the state agency, the court or a licensed professional in Missouri.
Also for Missouri: Medicaid long-term care in Missouri · Small estate limits in Missouri
How we checked this
Witness and handwritten-will rules come from a statute-cited 2026 survey and were compared with a second estate planning chart. Uniform Trust Code adoption follows the Uniform Law Commission's count of 36 states and DC. Last checked: November 12, 2026. Laws change; confirm with the state agency or a licensed professional before acting.
Cross-checked sources agree Checked on official source confirmed on a government, court or legislature site From a statute-cited table one detailed source Under review sources disagree; read the note and the law.