Contesting a Will UK: Grounds & Process (2026)

What this document is

Challenging a will means formally disputing whether a will is legally valid, or whether the estate has been distributed fairly in the eyes of the law. In England and Wales, these two things are treated quite differently. A validity challenge argues that the document itself should not take effect, perhaps because it was not signed properly, the person lacked mental capacity, or someone pressured them into making it.

A reasonable financial provision claim, brought under the Inheritance (Provision for Family and Dependants) Act 1975, accepts the will is valid but asks the court to adjust what the estate pays out to certain categories of people, such as spouses, children, or those financially dependent on the deceased. There are also claims based on promises made during the deceased's lifetime, known as proprietary estoppel, and disputes about how executors are handling the estate.

Each route has its own legal tests, evidence standards, and deadlines. Getting the category right at the outset matters, because the wrong approach can cost time and money and may miss the limitation window entirely.

How to use this document

1. Work out the basis of your challenge. Before doing anything else, identify which legal ground fits your situation: lack of capacity, undue influence, lack of valid execution, lack of knowledge and approval, fraud or forgery, or a claim for reasonable financial provision. Each has different evidence requirements and time limits, so pinning this down early shapes everything that follows.
2. Act quickly and check time limits. Time limits vary considerably. Inheritance Act claims generally must be brought within six months of the grant of probate, while validity challenges can sometimes be raised later but become much harder once the estate has been distributed. Entering a caveat at the Probate Registry can pause the issue of a grant while you investigate.
3. Gather supporting evidence. Collect everything that supports your position, including medical records, GP notes, care home records, earlier wills, letters, emails, text messages, and statements from people who knew the deceased's wishes or mental state. For financial provision claims, you will also need detailed records of your own finances and any support the deceased gave you.
4. Try to resolve matters without court. Most inheritance disputes settle without a full trial. Mediation and without-prejudice negotiation are often quicker, cheaper, and less damaging to family relationships than litigation. Courts expect parties to explore settlement seriously, and refusing reasonable attempts at resolution can affect costs orders later.
5. Issue a formal claim if needed. If settlement fails, the next step is issuing proceedings at the appropriate court. Validity claims typically go to the Chancery Division, while Inheritance Act claims can be brought in the County Court or High Court. The process involves particulars of claim, evidence exchange, witness statements, and potentially a trial where a judge decides the outcome.

Common questions