A guide to writing a valid will in Kenya — what the Law of Succession Act requires, the mistakes that void wills, and why a kitchen note could leave your children with nothing.

Your uncle finally wrote his will. He sat at the kitchen table in Nakuru, penned a letter to his children dividing the shamba, signed it ‘Dad,’ and slipped it into his Bible for safekeeping. He passed away last week.

That note is worthless.

Not because his intentions were unclear. Not because the handwriting was illegible. But because Section 11 of the Law of Succession Act (Cap 160) requires three specific things, and his kitchen note almost certainly lacked them.

Without those three things, the shamba passes under intestacy rules, the youngest daughter gets nothing, and your cousins spend the next decade fighting in the Environment and Land Court.

A valid will in Kenya is not just a matter of writing down your wishes. It is a matter of satisfying a precise legal test. Here is that test; and it takes three minutes.

The Law That Governs Every Will in Kenya

The Law of Succession Act, Cap 160, governs all wills and succession in Kenya, regardless of whether the deceased was Muslim, Christian, or observed customary practices. There is no exemption for informal documents; however, they clearly express the testator’s wishes.

In 2022, the High Court in Ripples International v Attorney General struck down several discriminatory provisions of the Act — specifically Sections 35(1)(b), 36(1), and 39(1)(b) — which had disadvantaged widows who remarried and mothers in intestate succession lines.

The Act is now constitutionally cleaner, but the formalities for a valid will remain exactly as strict as they have always been.

The 3-Minute Will Validity Test

Pull out your will — or your parent’s will, or your uncle’s note — and work through these three checks.

Minute 1: Is It in Writing?

This sounds obvious. It is not.

A will must be written — either handwritten (holographic) or typed. Under Kenyan law, audio recordings are void. Video messages are void. The heartfelt voice note your father sent explaining how the land should be divided carries no legal weight whatsoever in a probate court.

The limited exception: Where death is genuinely imminent, and writing is physically impossible, an oral (nuncupative) will is permitted — but only for personal property valued under KSh 30,000, and it expires automatically after 30 days if the testator survives. Oral wills are also extremely difficult to prove. They are a last resort, not a substitute.

Minute 2: Is It Signed Correctly?

The testator must sign the will — not initials, not a nickname, not ‘Dad.’ A thumbprint is acceptable only where the testator was physically unable to sign, and two witnesses attest that the mark was made in their presence.

Critically, the signature must appear at the foot of the document. Kenyan courts treat anything written below the signature as legally non-existent. The postscript your father added after signing — ‘Oh, and give the cow to Auntie Wanjiku’ — is dead in law. It does not matter how clear the handwriting is.

Minute 3: Are There Two Independent Witnesses?

This is where the majority of homemade wills fail, and where family intentions collapse into family litigation.

Section 11 of the Law of Succession Act requires the will to be attested by two or more competent witnesses. Each witness must:

• Be present when the testator signs, or be present when the testator formally acknowledges an existing signature
• Sign the will in the presence of the testator
• Sign in the presence of each other

The beneficiary trap: A beneficiary cannot witness a will. If your brother witnesses the will that leaves him the family home, that specific gift to him becomes void. The rest of the will stands — but your brother inherits nothing under it. This is one of the most common and most preventable errors in homemade wills.

The family witness trap: Family members who are not beneficiaries are legally permitted to witness — but their credibility is routinely challenged in court. Bank officers, advocates, clergy, and other independent professionals are strongly preferred.

Common Will-Killers: The Invalid Will Checklist

These are the most frequent reasons wills are voided or successfully challenged in Kenyan courts:

Three Situations That Catch Even Careful Testators Off-Guard

1. Your Divorce Settlement Agreement May Override Your Will

This is a subtlety that invalidates even technically perfect wills, and most people never consider it.

If you divorced and signed a Divorce Settlement Agreement (DSA) that transferred a specific property to your former spouse — or confirmed that it remained theirs — you cannot subsequently will that property to anyone else. The DSA operates as an inter vivos (lifetime) disposition of the asset. By the time you die, you no longer own that property, and you cannot bequeath what you do not own.

In JJM v JLM [2025], the High Court confirmed that a Divorce Settlement Agreement executed in 2017 constituted a binding contract governing property distribution that overrode later will provisions concerning the same property. The will was technically valid — the specific gift simply failed.

Practical step: Before drafting or updating your will, have your advocate review all previous DSAs, transfer documents, and title records to confirm you actually own what you intend to leave.

2. The Safe Deposit Box Problem

Many Kenyans store their wills in a bank safe deposit box, believing this is the safest place. It creates a serious practical problem.

Safe deposit boxes are sealed by the bank upon notification of a customer’s death. Your executors need the will to begin probate proceedings — but the bank will not release the contents of the box without court authority.

Obtaining that court authority requires, among other things, producing the will. The result is a delay of months before the estate can even begin administration.

Better practice: Keep the original with your advocate. Provide certified copies to your appointed executors. Consider registering with the probate registry.

3. Constitutional Equality Now Scrutinises Discriminatory Wills

Recent constitutional jurisprudence has significantly strengthened the rights of persons who might previously have been left out of estates. There are three developments every testator should understand:

• Equality of spouses: Article 45(3) of the Constitution mandates equal rights during marriage and upon its dissolution. Wills in polygamous estates that treat wives unequally, or that discriminate between sons and daughters, now face heightened judicial scrutiny.
• Children born outside marriage: In Faraj v Mwawasi [2025], the Supreme Court held that children born outside of wedlock cannot be excluded from succession where such exclusion would violate constitutional equality guarantees — even where the exclusion is based on personal law.
• Widows who remarry: Following the Ripples International ruling, widows no longer lose their life interests in an estate simply because they remarry. Mothers now rank equally with fathers in intestate succession lines.

What Happens When a Will Is Invalid: The Cost of Intestacy

When a person dies without a valid will — whether because they never made one or because the one they made fails legally — the estate is administered under the intestacy rules in Sections 35 to 42 of the Law of Succession Act. The distribution is fixed by statute:

• The surviving spouse receives a life interest in the residue — they can occupy the property and benefit from it, but cannot sell or transfer it
• Children receive equal shares of the remainder
• If there are no surviving spouse or children, the estate passes to parents, then to siblings

This sounds orderly. In practice, it takes two to five years to administer, requires court bonds in most cases, and invites disputes at every stage — particularly over land that has been occupied, improved, or subdivided informally over generations.

A valid will, by contrast, typically takes six to twelve months to probate. It allows you to name your chosen executor, waive the bond requirement, and give the court clear direction on your intentions. It keeps your family out of years of litigation.

In re Estate of Kigen Cheboi Kipchorsoi [2025]: A will executed in 1990 was still being litigated 34 years later. Family members had built permanent homes on parcels they believed were theirs.

When the court eventually resolved the dispute, those homes were demolished during the implementation of the final order. Legal fees exceeded the value of the estate.

A professionally drafted will costs between KSh 15,000 and KSh 50,000. A single day of probate litigation costs more.

Your 3-Minute Action Plan — Do This Today

Take out your will right now — or your parents’, or any family member’s document that is being treated as a will — and check:

1. Is it in writing? Not a voice note, not a video, not a verbal instruction — a physical, written document.
2. Is it signed at the foot? By the testator themselves, in full, at the very bottom of the document.
3. Are there two independent witnesses? People who are not beneficiaries, whose signatures appear on the document, who were present when the testator signed.
4. Does any Divorce Settlement Agreement affect the property? If the testator was ever divorced, a DSA may already control some or all of the assets.
5. Is the original stored accessibly? Not in a sealed bank box — with an advocate or named executor.

If any answer is ‘no’ or ‘I am not sure,’ you have either an invalid will or a will at serious risk of being challenged.

How Mukamba & Company Advocates Can Help

Mukamba & Company Advocates specialises in succession law, will drafting, and estate administration across Kenya. We have advised on estates ranging from single urban apartments to complex multi-generational land holdings — and we have seen, first-hand, what happens to families whose wills fail the Section 11 test.

We assist with:

• Drafting wills that are properly executed, witnessed, and structured to reflect your specific wishes
• Reviewing existing wills and identifying execution defects before they become courtroom disputes
• Advising on how Divorce Settlement Agreements and other inter vivos documents interact with your estate plan
• Probate applications and estate administration — contested and uncontested
• Succession disputes, including matters involving children born outside marriage and polygamous estates

Your legacy deserves better than a kitchen note. It deserves legal certainty.

📧 Email: info@mukambalaw.com

📞 Phone: +254 706 223 157

This article is for general informational purposes only and does not constitute legal advice. Succession law is highly fact-specific. Contact Mukamba & Company Advocates for guidance tailored to your circumstances.

© 2026 Mukamba & Company Advocates. All rights reserved

Author: Eugene

Mukamba Managing Partner