How to Contest a Will in Delaware: Grounds, Process, and Deadlines

Contesting a will in Delaware is difficult by design. The legal system presumes that a properly executed will reflects the testator's genuine wishes, and the burden of proof falls on the person challenging it. But when there's evidence of fraud, incapacity, or undue influence, Delaware law provides a clear path to challenge the document.

Understanding the grounds, the process, and the practical reality of a will contest is important for two reasons: to know when a challenge is legitimate, and to know how to draft a will that is more resistant to challenge.

Legal Grounds for Contesting a Delaware Will

A will contest must be based on one or more recognized legal grounds. "I don't like the distribution" or "it's not fair" are not valid bases for a challenge.

Lack of testamentary capacity. The testator must have understood, at the time they signed the will, what their assets were, who their natural heirs were, and what the will was doing. Dementia, Alzheimer's disease, or mental illness can undermine capacity — but the standard is set at the moment of signing, not before or after. A person with early-stage dementia may have periods of lucidity during which a will can be validly executed.

Undue influence. Someone in a position of trust (a caregiver, adult child, or advisor) exerted such pressure that the will reflects their wishes, not the testator's. Courts look for a pattern: isolation of the testator from other family members, control over finances or daily care, a sudden change in estate distribution favoring the influencer, and the testator's dependence on that person.

Fraud or forgery. The testator was deceived about the contents of the will (told it said one thing when it said another), or the signature was forged. Physical evidence — handwriting analysis, witness testimony, document examination — drives these cases.

Improper execution. The will does not meet Delaware's statutory requirements: not in writing, not signed by the testator or a directed signer as permitted by law, or not witnessed by two competent adults. This is the most straightforward ground because it's purely a question of whether the formal requirements were met.

Where a Will Contest Is Filed

The Register of Wills handles routine will probate administration. A will contest, including a challenge based on improper execution, incapacity, undue influence, fraud, or forgery, is handled by the Court of Chancery. This is a full court proceeding with discovery, witness testimony, and potentially a trial.

This division between county-level probate administration and the Court of Chancery's dispute jurisdiction is a distinct feature of Delaware's system.

The Timeline

Delaware's will-contest timing depends on the procedural posture. Under 12 Del. C. § 1308, a caveat against allowance of an instrument as a will must be received by the Court of Chancery before the order of probate. Under 12 Del. C. § 1309, an interested person who did not voluntarily appear at the proof of the will or receive the required notice may petition for review within six months after the order of probate:

• A person who believes they were improperly omitted from a will should raise the challenge as soon as the will is admitted to probate — delays weaken credibility
• Challenges to the validity of the will's execution can be raised through the applicable Court of Chancery proceeding
• Other grounds may involve separate limitations rules, so courts expect challenges to be raised promptly

Practically, most will contests are filed within the first few months after the will is admitted. Waiting years undermines both the legal argument and the available evidence.

The Cost Reality

Will contests are expensive. Attorney fees for a contested probate matter in Delaware typically start at $10,000 and can exceed $50,000 for cases that go to trial. Both sides bear their own costs unless the court determines that the losing party acted in bad faith.

The estate itself may also bear costs — executor's legal fees for defending the will are paid from estate assets, which reduces what all beneficiaries ultimately receive. A will contest often damages the estate more than the original dispute was worth.

How to Make Your Will More Resistant to Challenge

The best way to handle a potential will contest is to prevent it:

Include a self-proving affidavit. Under 12 Del. C. § 1305, a notarized affidavit signed by the testator and both witnesses at the time of execution reduces the need for witness testimony during probate, but it does not prevent a will contest.

Use disinterested witnesses. Choose witnesses who are not family members, not beneficiaries, and have no financial stake in the estate.

Get a capacity evaluation. If there's any concern about cognitive decline, have the signing witnessed by the testator's physician, who can provide a contemporaneous assessment of mental capacity.

Document the process. Some attorneys recommend video recording the signing ceremony (with the testator's consent) to create evidence of voluntariness and capacity.

Add a no-contest clause. A provision that strips any beneficiary of their inheritance if they challenge the will. Delaware courts generally enforce these clauses, though their deterrent effect depends on the size of the inheritance at stake.

The Delaware Basic Estate Planning Kit includes the self-proving affidavit format, witness eligibility guidance, and execution checklist that help create a will resistant to challenge — so your family spends its energy on healing, not on litigation.

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