How to Write a Valid Will in Kenya (2026): Law of Succession Act and Witnessing Rules

What the Law of Succession Act says about capacity

Section 5 of the Law of Succession Act (Cap 160, Laws of Kenya) sets the baseline: any person who is of sound mind and not a minor may dispose of all or any of his free property by will. Because "minor" means a person under the age of eighteen, the practical threshold is eighteen years of age. "Sound mind" is not defined in the statute, but the courts interpret it to mean the testator understands the nature of the act, knows the general extent of the property being disposed of, recognises the claims of persons who might reasonably expect to benefit, and appreciates how the clauses connect to produce a coherent plan of distribution.

Capacity is assessed at the time of execution, not at the time of drafting. A testator who drafted a will months before signing it must still have testamentary capacity on the day the document is actually executed. Medical evidence — GP notes, psychiatric assessments — carries significant weight in contested estate proceedings where capacity is in dispute.

The two-witness rule explained

Section 11 of Cap 160 sets out the formal requirements. Every will must be:

• In writing (typed or handwritten; no audio or video wills are recognised);
• Signed by the testator at the end of the document, or by some other person in the testator's presence and at the testator's express direction;
• Signed or acknowledged by the testator before two or more witnesses present at the same time;
• Attested and signed by those witnesses in the presence of the testator.

The phrase "present at the same time" is not decorative. Both witnesses must be in the room when the testator signs or acknowledges the signature. A witness who steps out and countersigns later has not met the statutory requirement, regardless of good faith.

Witnesses do not need to read the will or know its contents. They are attesting to the fact of execution, not the wisdom of the dispositions. A witness cannot, however, be a beneficiary under the same will — s.13 of Cap 160 provides that any gift to an attesting witness is void unless the will is also attested by at least two additional competent and independent witnesses. In practice, because most wills are attested by exactly two witnesses, a gift to either of them will fail. The will itself remains valid; only the bequest to the interested witness is struck out. Choose witnesses who have no financial interest in the estate.

Holograph wills and the written requirement

Kenya does not recognise holograph wills (entirely handwritten and unwitnessed) as a standalone category in the way some civil-law jurisdictions do. A handwritten will is perfectly acceptable, but the witnessing requirements under s.11 still apply. There is no exception for wills written entirely in the testator's own hand.

This matters practically: many people assume that a handwritten letter addressed to family members and setting out their wishes constitutes a binding will. Under Cap 160, it does not — at least not without the two-witness formality.

Privileged wills for active-duty soldiers and seafarers

Section 9 of Cap 160 creates a narrow exception for oral wills made during active service. A soldier or mariner who makes an oral will before two or more witnesses is not bound by the general rule requiring the testator to die within three months of making it — the will remains valid provided the testator dies during the same period of active service. The exception applies only during active service. Once the soldier or mariner is no longer on active service, any subsequent will must comply with the standard written and witnessed requirements of s.11.

Customary wills under Cap 160

Section 4 of the Law of Succession Act preserves a parallel track for Customary Law wills among communities whose customary rules are not displaced by the Act. Cap 160 does not apply to agricultural land held under customary tenure when the deceased was a member of a community subject to customary law at the time of death — sections 32 and 33 of the Act draw this boundary, leaving devolution of such land to the law or custom applicable to the deceased's community.

A Customary will — sometimes called an oral or deathbed declaration — is made according to the customs of the deceased's community, typically in the presence of clan elders or close male relatives who act as witnesses and custodians of the declaration. No writing is required by customary law, though a written record witnessed by elders strengthens enforceability considerably when the estate later goes to the Succession Court.

Key practical points:

• Customary wills generally govern immovable property held under customary tenure and personal chattels within the community;
• A person may not have two simultaneous wills — one formal and one customary — purporting to dispose of the same property;
• When a formal Cap 160 will and a customary declaration conflict, the formal will ordinarily prevails for property within the Act's scope.

The forms-legal.com Kenya Customary Last Will document template provides a starting framework for Kenyans who want a written record of a customary disposition to supplement an oral declaration.

Islamic wills (Wasiyyah) and the Muslim exemption

Section 2(3) of Cap 160, read with the First Schedule, exempts Muslims from the Act's intestacy provisions where Islamic law applies. A Muslim may write a Wasiyyah — a testamentary gift — but Islamic law restricts testamentary freedom in ways that differ from Cap 160:

• A gift (wasiyyah) to a non-heir cannot exceed one-third of the net estate after debts;
• Gifts to heirs who already receive a fixed Qur'anic share (Fara'id) are not permissible without consent of the remaining heirs;
• The Wasiyyah takes effect after payment of debts and funeral expenses.

For execution purposes, an Islamic will in Kenya should still be written and witnessed — the two-witness rule is consistent with Islamic tradition and removes any procedural ambiguity before the Kadhi's Court or High Court. Where the deceased was a Muslim and the property falls under the Kadhis' Court Act (Cap 11), the estate is distributed under Islamic inheritance law rather than Cap 160's intestacy rules.

Registration and safekeeping

Kenya has no mandatory will registration regime. A will does not need to be filed with any government body to be valid. That said, the will must be produced in original form when the executor applies for a Grant of Probate at the High Court (Probate and Administration Division) under the Probate and Administration Rules. A lost original creates a costly reconstruction problem — courts require evidence of the original's contents and the circumstances of its disappearance before acting on a copy.

Practical safekeeping options:

• Deposit with a licensed advocate under a sealed envelope arrangement;
• Store with a commercial bank safe-custody service;
• Leave with a trusted person who knows to produce it promptly on death.

Informing your executor of the will's location is as important as drafting the document itself.

Common drafting errors that invalidate or complicate a will

Beneficiary as witness. Already noted under s.13 — the gift to that beneficiary fails where only the two statutory minimum witnesses are present. Re-execute with independent witnesses to avoid the problem entirely.

No residuary clause. A will that disposes of specific assets but says nothing about the remainder leaves the residue to pass on intestacy under Cap 160's default rules, which may not reflect the testator's intentions at all.

Imprecise asset descriptions. "My house" is ambiguous if the deceased owns more than one property or if the registered title differs from the common name. Use the title deed reference number and physical description.

Failure to update after major life events. A will made before marriage is revoked by the marriage under s.19 of Cap 160 (unless the will was expressly made in contemplation of marriage with a specified person). A will made before children are born does not automatically accommodate them. Review the document after marriage, divorce, birth of a child, or significant change in assets.

Executor who predeceases the testator. Name at least one substitute executor. Without one, the estate may require a fresh court application for Letters of Administration with Will Annexed — a slower and more expensive process.

Executing the will: a step-by-step summary

1. Confirm the testator is 18 or older and currently of sound mind;
2. Ensure the document is in writing and covers all intended property, including a residuary clause;
3. Assemble two witnesses who are not beneficiaries and not spouses of beneficiaries;
4. The testator signs at the foot of the last page while both witnesses watch — or acknowledges an existing signature in their simultaneous presence;
5. Each witness then signs in the testator's presence, adding their full name, address, and occupation;
6. Store the original securely and inform the executor of its location.

No notarisation is required by Cap 160, though some advocates recommend affixing a self-proving affidavit to reduce procedural hurdles at probate.

A will is a document that courts examine under a microscope when families disagree. The Law of Succession Act's requirements exist precisely to filter out documents produced under duress, confusion, or fraud. Drafting a clear, properly executed will — one that names a capable executor, describes assets precisely, and acknowledges the applicable legal framework for the community — is the most direct way to ensure that what you intend to happen actually happens.