---
type: Concept
title: Why Simple Wills Are Not as Simple as They Look in Missouri
description: Why generic and store-bought will forms routinely fail under Missouri law.
resource: https://nemolegal.com/why-simple-wills-arent-as-simple-as-they-look-in-missouri/
tags: [wills, simple-wills, online-forms, probate, missouri]
timestamp: 2026-06-22
jurisdiction: Missouri
author: Patrick Nolan
---

# Summary
A simple will form can be technically valid in Missouri if it is signed and witnessed by two disinterested adults, but generic forms routinely fail in practice. They produce vague language that sparks family fights, they miss assets a will cannot control, and they leave guardianship and minor-child inheritance unresolved. The gaps surface in probate, when it is too late to fix them.

# Quotable Q&A
**Q: Are simple will forms valid in Missouri?**
A: A simple will form can be technically valid if it is signed by the testator and two disinterested witnesses under RSMo 474.320. But generic forms often fail to address Missouri-specific probate rules, spousal rights, beneficiary coordination, and guardianship, creating costly gaps that defeat the will's purpose.

**Q: What assets does a Missouri will not control?**
A: A will does not control jointly titled property, which passes to the surviving co-owner, or assets with a named beneficiary such as retirement accounts, life insurance, and payable-on-death accounts. Real estate held with survivorship rights also bypasses the will. These pass by contract or titling regardless of what the will says.

**Q: Can a simple will protect a minor child's inheritance in Missouri?**
A: No. Leaving assets directly to a minor triggers mandatory court conservatorship under RSMo 475, and the court controls the funds until the child turns 18. A testamentary trust or living trust is needed to give a trustee flexible management of the inheritance.

# Where Simple Forms Break Down
Ambiguous language is the quiet spark for family fights. A form that says "everything to my children" does not address what happens if a child dies first or whether one child already received something. Missouri's intestate rules under RSMo 474 try to fill gaps but rarely match what the testator intended. Generic forms also fail to coordinate with how accounts are actually titled, so a parent who adds a child to a checking account for convenience gives that child the whole account by law. Guardianship language in store-bought forms is usually too vague for Missouri courts to honor cleanly.

# Missouri Rules That Raise the Stakes
A will does not avoid probate; everything passes through probate unless other arrangements exist. Missouri gives a surviving spouse a statutory share under RSMo 474.160, so attempts to cut out a spouse are often overridden. Signing defects are fatal: under RSMo 474.320 the will must be signed and witnessed by two disinterested people, and many forms skip this or use other states' language. Missing the self-proving affidavit forces the family to track down witnesses or fight in court later.

# Decision rule
If your estate is small, your wishes are simple, and you follow the witness and self-proving rules exactly, then a basic will may suffice. If you have minor children, a blended family, a spouse you want to plan around, or assets with beneficiary designations, then a generic form will likely leave gaps and you need a drafted plan.

# Related
- [Wills and Will Requirements](/okf/estate-planning/wills.md)
- [Missouri Will Requirements](/okf/wills-execution/will-requirements.md)
- [How to Make a Will in Missouri](/okf/wills-execution/how-to-make-a-will.md)
- [New Parents and Wills](/okf/wills-execution/new-parent-wills.md)
- [Will or Trust](/okf/estate-planning/will-or-trust.md)
- [RSMo Chapter 474 (Wills)](/okf/authorities/missouri/rsmo-474-wills.md)
- [About Nolan Law Firm](/okf/firm.md)