What Happens If You Refuse Mediation in a Probate Dispute? New 2026 Rules Explained
Why Refusing Mediation in a Probate Dispute Could Cost You — Dearly
New court rules and landmark case law mean that skipping mediation is no longer just a missed opportunity. It can expose you to devastating cost penalties — even if you win.
Key takeaway: As of April 6, 2026, courts in England and Wales have full power to order parties in probate disputes to mediate — and to penalize those who refuse without good reason. Cost sanctions range from a 25% reduction in recoverable costs all the way to full indemnity costs (roughly 80–100% of the other side's legal fees).
What Changed — and When
The shift didn't happen overnight. It built through a series of rule changes and court decisions that, taken together, have fundamentally transformed the landscape of contentious probate litigation. Here's the timeline every estate practitioner needs to know:
The Stakes: What Sanctions Actually Look Like
Courts don't apply a one-size-fits-all penalty. The sanction depends on how unreasonable the refusal was, and whether the refusing party won or lost. But across recent cases, a clear spectrum has emerged:
The critical point: even winners are not safe. In Conway v Conway, the defendants prevailed on the merits — and still walked away covering a quarter of their own legal costs because they dismissed mediation without serious consideration. Winning the argument is no longer enough if you lost the ADR game.
What Courts Are Actually Looking At
Judges don't penalize every refusal. They ask whether the refusal was unreasonable — and they use a well-established set of factors (originally from Halsey v Milton Keynes NHS [2004], now codified in CPR 44.2(5)(e)) to decide:
- The nature and complexity of the dispute
- Whether the refusing party had a genuine and reasonable belief in their own case
- The cost of mediation relative to the value of the claim
- Whether mediation had a reasonable prospect of success
- Whether there were practical obstacles such as timing, third-party consents, or funding
Silence — simply not responding to a mediation invitation — is itself treated as unreasonable. Courts have been emphatic on this since PGF II v OMFS [2013]. Ignoring an offer is not a neutral act. It is a refusal, and it carries the same risk.
Why Probate Disputes Are Especially Suited to Mediation
Inheritance disputes are not just about money. They involve grief, family dynamics, perceived unfairness, and deeply personal histories. A judge can decide who inherits the house — but a mediator can help family members actually hear each other, reach terms they've chosen themselves, and preserve whatever relationship remains.
Courts recognize this. Probate mediation is particularly effective because it offers:
- Confidentiality — Sensitive family matters stay out of the public record
- Speed — Contested probate cases can drag through the courts for years; mediation often resolves in one or two sessions
- Cost-effectiveness — Mediator fees are almost always lower than the litigation costs they avoid
- Relationship preservation — Families who litigate to judgment rarely speak again; those who mediate sometimes do
- Control — Parties shape the outcome rather than handing it to a judge
What Practitioners and Clients Should Do Now
The rules are clear, the case law is consistent, and the direction of travel is one-way. Here is what we recommend to anyone involved in a contested estate matter:
- Raise ADR at the very first meeting. Discuss mediation before proceedings are issued. It signals good faith and — if litigation follows — gives you documented evidence that you considered it seriously.
- Put every ADR offer in writing. Date it, set a reasonable response deadline, and keep a copy. If the other side refuses or goes silent, that silence may later count against them.
- Respond to every invitation promptly. Even if you have reservations, engage constructively. Propose alternative dates or formats rather than rejecting outright.
- Document your reasons if you decline. Courts will ask. "We didn't think it would work" is not sufficient. Explain specifically why mediation was inappropriate at that stage.
- Appoint an accredited mediator. Use a Civil Mediation Council-accredited practitioner to protect the integrity of the process and meet the 2026 Code of Practice standards.
- Advise clients on the real cost of refusal. They need to understand that even if they win, refusing mediation may mean recovering as little as 75 cents on the dollar — or far less.
Three Cases Every Estate Litigant Should Know
The Court of Appeal's landmark ruling confirming that judges may lawfully order parties to engage in ADR — and may stay proceedings to facilitate it. This overturned the prior assumption from Halsey that compulsory mediation was impermissible. It opened the door to everything that followed.
Defendants won their probate dispute but were denied 25% of their recoverable costs. The judge found they had "seriously" refused mediation, describing it as "absurd," and held that a quarter of their costs was the appropriate penalty. Message: winning on the law does not insulate you from ADR cost consequences.
An executor removal appeal ended with the losing appellant ordered to pay costs on a full indemnity basis. The judge identified 26 proposed mediation dates that had been ignored, along with delays and unpleaded issues introduced mid-litigation. This is what the outer limit of ADR sanctions looks like.
Looking Ahead
The trajectory is clear. The Civil Justice Council has proposed mandatory pre-action ADR for many civil claims — which could eventually include a formal Contentious Probate Protocol requiring a mediation attempt before any claim is filed. The Civil Mediation Council's new Code of Practice is raising mediator standards. And courts are already using their expanded powers.
Mediation in probate disputes is no longer optional in any meaningful sense. Practitioners who treat it as a box to check will find themselves poorly positioned when a judge asks what steps were taken to resolve the matter without a trial. Those who treat it as a genuine first option — and help clients understand why — will serve their clients better and protect them from preventable cost exposure.
At DC Mediation and Dispute Resolution Institute, we work with families, estate solicitors, and executors to navigate contentious probate through skilled, confidential mediation. Our mediators are experienced in the dynamics of inheritance disputes — the legal complexity and the human dimension. If you are facing a contested estate matter, reach out before it goes further.
