Can a Will Be Challenged If the Testator Was Suffering From Dementia in Nigeria?

Yes. A Will can be challenged and declared null and void by a court if it is established that the testator lacked testamentary capacity due to dementia or mental infirmity when signing.

For a Will to be legally valid under Nigerian succession law, the testator must possess a sound disposing mind, memory, and understanding at the precise moment of execution.

The landmark principle in Banks v. Goodfellow requires that the testator must understand the nature of the act, the extent of their estate, and the claims of those who might reasonably expect to inherit.

Step-by-Step Procedure to Resolve This Legal Matter:

1. Preserve Contemporaneous Evidence: Collate physical receipts, verified bank timestamps, stamped letters, and electronic communication logs prior to formal intervention.
2. Deliver Statutory Pre-Action Notice: Issue a formal written demand outlining the specific statutory breach and giving the opposing party statutory time to remedy the grievance.
3. Engage Accredited Legal Counsel: Initiate judicial proceedings before the competent court of record or submit an official petition to the relevant regulatory commission.

Where medical evidence demonstrates that severe dementia, Alzheimer’s disease, or delirium clouded the testator’s mind, the probate court will revoke probate or refuse to admit the Will.

Key Evidential Considerations & Statutory Benchmarks:

• Documented statutory breach and verified timeline of events.
• Jurisdictional competence of the regulatory agency or superior court.
• Contemporaneous written correspondences, notices, and financial records.
• Quantifiable proof of pecuniary loss or civil rights violation.

“The rule of law ensures that statutory rights and duties cannot be compromised by informal arrangements or administrative fiat; every citizen has the constitutional right to due process.”
— Nigerian Legal Precedent & Constitutional Jurisprudence

Family members contesting a Will on grounds of mental incapacity must produce solid evidence, such as hospital admission records, psychiatric evaluations, and treating physician testimonies.

In addition to medical records, courts consider the testimony of attesting witnesses, close acquaintances, and family members regarding the testator’s day-to-day behavior around the execution date.

If the court invalidates the disputed Will, the deceased person’s estate will either devolve according to an earlier valid Will or be distributed under applicable intestacy laws.

Suspicious circumstances, such as sudden radical changes in property distribution favoring a new caregiver or acquaintance, increase the burden of proving testamentary capacity.

To prevent capacity disputes, elderly testators should execute their Wills in the presence of a medical doctor who provides a contemporaneous certificate of mental fitness.

Video recordings of the execution process and clear written reasons explaining disinheritance also help defeat future claims of dementia and incapacity.

Probate litigation involving testamentary capacity is complex and evidence-heavy, requiring specialized probate litigation counsel to navigate successfully.

The law ensures that a deceased person’s true, unclouded intentions govern their life’s work, shielding vulnerable seniors from manipulation during cognitive decline.

In Nigeria, the law exists to protect every citizen from exploitation and injustice, regardless of financial status or social standing. The courts are open to all, and regulatory agencies stand ready to enforce your rights.

Do not allow ignorance of the law to work against you. A brief consultation with a qualified Nigerian legal practitioner can clarify your rights and the remedies available in your specific situation.

For direct regulatory verification, official complaints, or accessing statutory registers without third-party fees, members of the public can consult the official portal of the Central Bank of Nigeria (CBN) Consumer Protection Portal.

Taking proactive legal action at the earliest sign of a rights violation is always better than waiting until the damage becomes irreversible. Nigerian courts have consistently protected citizens who assert their rights promptly and lawfully.

Ignorance of the law is no excuse.