What Should a Will Include? And What It Can't Control

A will covers the property you own in your own name alone when you die, and it names the people who will handle what comes next: an executor to settle the estate and, if you have young children, a nominated guardian to raise them. It does not reach anything that already has a named beneficiary or a surviving co-owner, which in many estates is the larger share of what a person leaves behind. Beyond those basics, a well-drafted will makes specific gifts, sweeps everything unnamed into a residuary clause, gives your executor authority over digital accounts, provides for pets, and records your funeral preferences even though those preferences usually surface too late to guide the funeral itself. This is general information rather than legal advice, and the details below differ enough between Missouri, Illinois, and Kansas that a licensed attorney in your own state is worth the hour.

What does a will actually control?

A will governs the probate estate, meaning assets titled in your name alone with no beneficiary attached: a house held solely in your name, a checking account with no payable-on-death designation, a car, furniture, tools, jewelry, a coin collection, a family farm. Inside that boundary a will does three jobs. It makes specific bequests, giving named items to named people. It sets a residuary clause, which catches everything you did not list by name, including the property you buy after you sign the will and the gifts that fail because the person you named died first. And it grants your executor the powers needed to sell property, pay claims, file the final tax return, and close the estate without returning to court for permission at every step. A will without a residuary clause is the most common self-inflicted wound in do-it-yourself estate planning: whatever the clause would have caught instead passes under Missouri, Illinois, or Kansas intestacy law, which may hand it to relatives you never intended to include.

What passes outside a will no matter what it says?

Beneficiary designations win. A life insurance policy pays the person named on the policy, and a 401(k) or IRA pays the beneficiary on file with the plan administrator, regardless of what your will says about that money. Federal law governing employer retirement plans adds another wrinkle: a spouse generally has to consent in writing before someone else can be named on a workplace plan. Property held in joint tenancy with right of survivorship also skips the will entirely, passing to the surviving joint owner at the moment of death, which is why adding an adult child to a deed or a bank account as a joint owner quietly rewrites your estate plan. Missouri, Illinois, and Kansas all honor these transfers, and none of them let a will override a valid designation. The practical takeaway is that updating a will after a divorce, a remarriage, or a death in the family does nothing unless you also pull the beneficiary forms and update those.

Payable-on-death and transfer-on-death registrations do the same thing for accounts and real estate, and all three states offer a deed form that moves a house without probate. Missouri's beneficiary deed statute, found at Section 461.025 of the Revised Statutes of Missouri and part of the state's broader Nonprobate Transfers Law in Chapter 461, transfers the owner's interest on death as long as the deed is recorded with the county recorder of deeds before the owner dies. Illinois uses a transfer on death instrument under the Real Property Transfer on Death Instrument Act at 755 ILCS 27; amendments effective in 2022 expanded it beyond residential property to real property generally, and the instrument must be signed, notarized, witnessed by two people who are neither the notary nor a beneficiary, and recorded before death. Kansas allows a transfer-on-death deed under K.S.A. 59-3501, again recorded during the owner's lifetime, with no requirement that the beneficiary be told or consent. All three are revocable while you are alive, and all three leave the will with nothing to say about that house.

Who you name matters more than what you leave

The executor, called a personal representative in much of Missouri and Kansas probate practice, is the person who inventories assets, notifies creditors, files tax returns, sells what needs selling, and distributes the rest. Name a first choice and at least one alternate, because the alternate gets used more often than people expect. If you have children under eighteen, the will is also where you nominate a guardian, and it is worth understanding what that nomination does and does not do. Under Section 475.045 of the Revised Statutes of Missouri, a guardian named by the will of the last surviving parent is given real weight, but the court can still find that person unfit after notice and a hearing and appoint whoever best serves the child. Illinois courts under the Probate Act of 1975 and Kansas courts under the state's guardianship code treat a testamentary nomination the same way: as strong evidence of a parent's wishes, not as a binding instruction. Naming someone still matters enormously, because the alternative is a judge choosing among relatives with no guidance at all.

What about digital assets, pets, and funeral wishes?

All three states have adopted the Revised Uniform Fiduciary Access to Digital Assets Act, which sets the rules for whether your executor can get into your email, cloud storage, photo libraries, and online accounts. Illinois codified it at 755 ILCS 70, Kansas at Article 48 of Chapter 58 of the Kansas Statutes, and Missouri within Chapter 472 of the Revised Statutes. The act works in a specific order: an online tool provided by the company, such as a legacy contact setting, controls first; if you have not used one, the language in your will or trust controls; and only if both are silent does the provider's terms-of-service agreement decide, which usually means denial. That makes an explicit digital assets clause one of the highest-value paragraphs in a modern will. Pets are handled differently. A pet is legally property, so you can leave an animal to a person by will, but you cannot leave money to the animal itself; instead all three states permit a trust for the care of an animal under their versions of the Uniform Trust Code, at Section 456.4-408 in Missouri, 760 ILCS 3/408 in Illinois, and K.S.A. 58a-408 in Kansas, funded with a realistic amount and naming a caregiver plus someone to enforce it.

Funeral wishes belong in a will only as a backup, because the will is very often located and read days or weeks after the funeral has already happened. Missouri handles this through the right of sepulcher at Section 194.119 of the Revised Statutes, which gives first priority to an attorney-in-fact under a durable power of attorney that specifically grants that right, then to a surviving spouse, children, parents, and siblings in order. Kansas sets its priority list at K.S.A. 65-1734, starting with an agent under a health care power of attorney who has been given that authority, then spouse, adult children, and parents, with no separate slot for a freestanding written directive. Illinois is the outlier of the three: the Disposition of Remains Act at 755 ILCS 65 lets you name an agent in a notarized written instrument and gives second priority to an executor acting on written directions in a will, which the act says are carried out without waiting for probate. Even in Illinois, the safer approach is the same everywhere: write the instructions down separately, sign the appropriate designation form, and hand a copy to the person who will be standing in the funeral home.

How do Missouri, Illinois, and Kansas require a will to be signed?

Missouri requires, under Section 474.320 of the Revised Statutes, that the will be in writing, signed by the testator or by another person at the testator's direction and in the testator's presence, and attested by two or more competent witnesses who subscribe their names in the testator's presence. Missouri does not recognize holographic wills, meaning a handwritten, unwitnessed document does not become a valid Missouri will simply because the handwriting is unmistakably yours, though Missouri courts will probate a holographic will that was validly executed in a state that permits them. Section 474.337 allows a will to be made self-proved by having the testator and witnesses acknowledge it before an officer authorized to administer oaths, who attaches a certificate under seal. That self-proving affidavit is not required for validity, but it spares your family from tracking down witnesses years later to testify that they watched you sign.

Illinois requires two credible witnesses under the Probate Act of 1975, and like Missouri does not recognize handwritten wills that lack witnesses. Notarization is not required for validity in Illinois, but the Probate Act allows a will to be admitted on an attestation clause or a witness affidavit attached to the will, and attorneys routinely notarize that affidavit for the same reason Missouri lawyers use self-proving affidavits. Kansas, under K.S.A. 59-606, requires that the will be in writing and signed at the end by the testator or by another at the testator's express direction, and attested by two or more competent witnesses who saw the testator sign or heard the testator acknowledge the will; the same statute provides a self-proving procedure, and states that an uncontested self-proved will is admitted to probate without testimony from any subscribing witness. Kansas likewise does not validate unwitnessed handwritten wills, though it keeps a narrow oral-will exception at K.S.A. 59-608 for words spoken during a final illness, limited to personal property and valid only if reduced to writing and signed by two disinterested witnesses within thirty days.

What can a will not do?

A will cannot disinherit a spouse outright. Missouri gives a surviving spouse an elective share under Section 474.160, one-third of the estate if the decedent left lineal descendants and one-half if not, on top of statutory allowances. Illinois lets a surviving spouse renounce the will under 755 ILCS 5/2-8 and take one-third when there are descendants or one-half when there are none. Kansas takes a different approach at K.S.A. 59-6a202, calculating an elective share against an augmented estate on a scale that rises with the length of the marriage. A will also cannot control the nonprobate assets described above, cannot appoint someone to make medical or financial decisions while you are alive, which requires powers of attorney signed separately, and cannot reliably direct your funeral on the timeline a funeral actually runs on. Treat everything here as background rather than legal advice for your situation. If you want to sort out which of your assets are actually inside the will and which are already spoken for, PartingPoint can help you organize the list and find an estate planning attorney licensed in Missouri, Illinois, or Kansas to review it with you.