TLDR: A contested will means someone is challenging whether it’s valid or whether it was divided fairly. These cases move through probate court, take months or years, and usually cost far more than mediation would. This post covers why wills get challenged, what the court process looks like, and how a barrister builds a case on either side.

Why Wills End Up Contested

Most families never see a contested estate. But when they do, it’s rarely about money alone. It’s about who got left out, who got more than expected, or who thinks a parent wasn’t in their right mind when they signed.

Common Grounds for a Challenge

A challenge usually falls into one of a few categories. Lack of capacity is one, where the claim is that the person didn’t understand what they were signing. Undue influence is another, and it comes up a lot when a caregiver or new partner ends up with most of the estate. Fraud and forgery happen too, though less often. And then there’s improper execution, where the will wasn’t signed or witnessed the way the law requires.

Who Has Standing to Challenge

Not just anyone can walk into court and contest a will. You generally need to be a beneficiary under an earlier will, a beneficiary under the current one, or someone who’d inherit under intestacy rules if the will were thrown out. Courts check this early, and a claim without standing gets dismissed before it goes anywhere.

What the Court Process Actually Looks Like

Once someone files a challenge, the estate can’t finish distributing assets until the matter is resolved. That alone puts pressure on both sides to move fast.

The executor named in the will has to respond to the claim and usually keeps managing the estate during the dispute, unless the court removes them. Then comes discovery, and this is where things get slow. Medical records, bank statements, emails, and witness statements all get pulled in. If capacity is the issue, expect a fight over the deceased’s medical history in the months or weeks before they signed.

Timeline and Cost

A straightforward contest might settle in six months. A messy one, especially with multiple beneficiaries and competing experts, can run two years or longer. Costs climb fast too. Expert witnesses on mental capacity alone can run into five figures, and that’s before trial.

Building a Case as the Person Challenging the Will

If you’re the one contesting, the burden is on you to prove your claim, not on the estate to prove the will is fine. That changes how you build the case from day one.

Gathering Medical and Behavioral Evidence

Capacity cases live or die on timing. A diagnosis six months before signing doesn’t automatically prove incapacity at the exact moment of signing. You need records close to that date, and ideally a witness who was there and noticed something off.

Documenting the Relationship History

Undue influence cases depend on showing a pattern, not one bad moment. Isolation from family, sudden changes in who handles the person’s finances, and a will that shifted dramatically right after a new relationship started. These patterns matter more to a judge than any single piece of paper.

Defending a Will Against a Challenge

If you’re the executor or a beneficiary trying to uphold the will, your job is simpler on paper but still demanding. You’re defending something that already exists.

Start with the witnesses who were present at signing. Their statements about the person’s demeanor that day carry real weight. If the attorney who drafted the will kept contemporaneous notes, those often settle capacity questions on their own, since lawyers are trained to flag concerns in the moment.

Why Mediation Comes Up So Often in These Cases

Courts push estate disputes toward mediation more than almost any other civil matter, and it’s not just about clearing dockets.

Family relationships are usually still salvageable at the start of a dispute. By the time a trial finishes, they often aren’t. Mediation lets both sides negotiate a split without a public record of accusations that family members have to live with afterward. It’s also just faster and cheaper, and in most contested estates, the legal fees eat into the very assets everyone’s fighting over.

A barrister experienced in these cases will usually recommend at least one serious attempt at mediation before trial, even in cases that feel personal and hard to compromise on. Sometimes that attempt fails and the case goes forward anyway. But when it works, everyone keeps more of the estate and a lot less of the resentment.