Is it possible to contest a will if I believe it’s unjust?

It can hurt to discover that a loved one left you less than you expected—or nothing at all. You may wonder whether you can challenge the will. In the United States, the answer is sometimes yes, but a will generally cannot be overturned just because it seems unfair. You usually need a legally recognized reason to challenge it.

State laws vary, so the rules where the person lived and where their estate is being handled matter.

Who can challenge a will?

Typically, you must have standing: a legal interest in the outcome. That might mean you are named in the will, would inherit under an earlier will, or would inherit under state law if there were no valid will. A concerned friend who would not inherit usually cannot contest it.

What reasons might make a challenge possible?

Common grounds include:

• Lack of capacity. The person making the will must have had enough mental ability to understand, in general, that they were making a will, what property they owned, and who might reasonably expect to inherit. A diagnosis of dementia alone does not settle the question; what matters is their condition when they signed.
• Undue influence. Someone may have pressured or manipulated the person so strongly that the will reflected the influencer’s wishes rather than their own. For example, an adult child who isolates a parent and takes over meetings with the parent’s lawyer may raise concerns. A close relationship or an unexpected gift, by itself, is not proof.
• Fraud or forgery. A signature may have been forged, or the person may have been tricked into signing a document they did not understand.
• Failure to follow signing rules. States have requirements for how a will must be signed and witnessed. If those rules were not met, the will may be invalid.
• A later valid will. A newer will may replace the one being used to distribute the estate.

Some states also give surviving spouses a right to claim a share of an estate despite what the will says. Rules for children who were left out vary considerably. Those are separate questions from whether the will itself is valid.

What if I was simply left out?

People generally have the right to leave their property unequally. A parent might leave more to a child who provided years of care, for instance, or leave an estate to charity. Those choices may feel painful without being legally improper.

It is also worth checking what the will actually controls. A jointly owned home, a life insurance policy, or an account with a named beneficiary may pass outside the will. Contesting the will may not change who receives those assets.

What should I do if I have concerns?

Act promptly. A will contest is often filed as part of probate, the court process for handling a deceased person’s estate. Deadlines can be short and differ by state and by the stage of the case. Contact a probate lawyer in the relevant state as soon as you can, especially if you have received court papers.

Before that conversation, gather what you can legally access: copies of the will and earlier wills, relevant messages, a timeline of changes in the person’s health or relationships, and names of people who witnessed important events. Focus on specific facts rather than suspicions. Do not take records or enter accounts you are not authorized to access.

Ask the lawyer about likely costs, possible evidence, and whether mediation—a guided effort to reach an agreement—makes sense. Also ask whether the will has a no-contest clause, a provision that may put an inheritance at risk if you challenge the will and lose. The effect of these clauses varies by state.

The practical question is not only “Was this fair?” but “Is there evidence of a legal problem, and is a challenge worth pursuing?” A local probate lawyer can help you assess both before a deadline passes.