Best Guide for Navigating Customary vs Statutory vs Islamic Inheritance in Nigeria

If your family is trying to settle an estate and you are not sure which inheritance system applies — statutory, customary, or Islamic — the answer depends on three factors: the type of marriage the deceased contracted, their state of residence, and their religious practice. Getting this wrong is not a minor issue. Filing under the wrong legal system invalidates your application and restarts the process from zero, adding 6–12 months. The best resource for this specific problem is one that maps all three systems side-by-side with a decision flowchart that resolves the correct framework for your situation before you file anything.

The Three Systems in Practice

Nigeria operates three parallel inheritance frameworks that rarely agree on who gets what:

The complexity intensifies when systems overlap. A Marriage Act marriage triggers statutory succession for the whole estate — but if the family is Bini, the eldest son may assert the Igiogbe claim to the ancestral house, which customary law says overrides even testamentary instructions. If the deceased was Muslim but married under the Marriage Act, statutory law technically governs, but family and community pressure to apply Sharia inheritance math can be intense.

Why Generic Resources Fail Here

Most Nigerian estate settlement information covers one system in isolation. Government portals explain the probate filing process without addressing which legal framework determines who inherits. Law firm blog posts discuss specific cases without providing a practical decision framework. Online forums share experiences under one system without clarifying that a different marriage type would produce a completely different outcome.

The result: families file under the wrong system, use the wrong court, or distribute assets based on community pressure rather than legal entitlement — and discover months or years later that the distribution was legally invalid.

What the Right Guide Covers

A guide adequate for Nigeria's three-system inheritance landscape must include:

• The decision flowchart — a visual tool that maps marriage type + state + religion + ethnic group to the correct legal framework before any filing begins
• Side-by-side comparison of distribution rules under all three systems for the same family structure (what statutory law gives a widow vs. what Igbo custom gives her vs. what Sharia gives her)
• Constitutional overrides — the Ukeje v. Ukeje (2014) ruling on female inheritance, Mojekwu v. Mojekwu on widow disinheritance, and the practical steps to assert constitutional rights when extended family invokes custom
• Overlap scenarios — what happens when a Marriage Act marriage exists but the family demands customary distribution, when a Muslim dies under statutory marriage, when multiple systems have legitimate claims
• Court routing — which court handles the application under each system (High Court Probate Registry for statutory, Area Court or Customary Court for customary, Sharia Court for Islamic in the northern states)

The Guide to Estate Settlement and Inheritance in Nigeria covers all three systems in a single resource, including the decision flowchart, distribution tables, landmark case analysis, and court routing for each framework.

Common Conflict Scenarios

Scenario 1: Marriage Act Marriage + Igbo Family

The deceased married under the Marriage Act, which triggers statutory succession. But the eldest brother claims Okpala rights under Igbo custom. Resolution: Statutory law governs. Ukeje v. Ukeje (2014) confirmed that customs excluding females from inheritance violate Section 42 of the Constitution. The widow and children have statutory rights that override customary claims — but asserting them requires filing in the correct court with the constitutional arguments ready.

Scenario 2: Muslim Deceased + Southern State Residence

The deceased was a practicing Muslim who lived in Lagos. The family wants to apply Islamic inheritance fractions. Resolution: If the marriage was under the Marriage Act, statutory law governs regardless of religious practice. If the marriage was under Islamic law (including customary marriage in a Muslim community), Sharia inheritance applies. The marriage certificate — not the deceased's faith — determines the governing framework.

Scenario 3: Bini Estate with a Will

The deceased left a Will directing the ancestral house to a younger son. The eldest son asserts the Igiogbe right. Resolution: Under Bini customary law, the Igiogbe (ancestral house) must pass to the eldest son regardless of testamentary instructions. Courts have upheld this customary exception even when a valid Will exists. The Will governs the rest of the estate, but the Igiogbe follows customary law.

Who This Is For

• Families where the applicable legal system is genuinely uncertain — mixed marriages, dual religious backgrounds, states where multiple systems have concurrent jurisdiction
• Widows and daughters facing customary disinheritance pressure who need to understand their constitutional rights and the specific court procedures to enforce them
• Executors who need to verify which court to file with before beginning the probate application

Who This Is NOT For

• Families where the applicable system is clear and uncontested (single-system estate with cooperative heirs)
• Estates already under active court proceedings where the governing law has been determined by the court
• Families seeking customary mediation only, with no intention to pursue formal court-administered probate

Frequently Asked Questions

Can I choose which inheritance system to file under?

No. The governing system is determined by the type of marriage the deceased contracted, not by family preference. A Marriage Act marriage triggers statutory succession. A customary marriage triggers customary law. An Islamic marriage triggers Sharia. Filing under the wrong system results in application rejection.

What if my father had two marriages — one under the Marriage Act and one customary?

This is a common scenario, particularly in families where the deceased had a first marriage under the Marriage Act and a subsequent customary marriage. The Marriage Act marriage generally governs the estate, but the customary wife and her children may have rights under specific state laws. This is one of the scenarios where legal advice beyond a guide may be warranted, though the guide explains the framework and the key cases.

Does the Supreme Court ruling in Ukeje v. Ukeje actually change anything in practice?

Legally, yes — the ruling definitively struck down customs that disinherit female children as unconstitutional. Practically, enforcement depends on asserting the constitutional right in court. Extended family members who invoke custom are unlikely to change behaviour based on a Supreme Court ruling they may not know about. The guide covers both the legal position and the practical steps to enforce it — including which court to file in and what documentation to present.

Is Islamic inheritance law mandatory for all Muslims in Nigeria?

Only for Muslims whose marriage was contracted under Islamic law or customary law recognised by a Sharia Court. A Muslim who married under the Marriage Act is governed by statutory succession law, not Sharia. The distinction is the marriage type, not the religious identity of the deceased.

Guide to Estate Settlement and Inheritance in Nigeria →