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A successful will challenge declares the will invalid. The estate then passes under the previous valid will or intestacy. Any grant issued under the invalid will is revoked. Distributed assets can in principle be recovered but may be difficult to trace. An Inheritance Act success produces a provision order, not invalidity.
A successful will challenge can have far-reaching consequences — both for the estate and for the people involved. Understanding what actually happens when a challenge succeeds is important for anyone considering litigation, and also for executors and beneficiaries who need to understand the risks they face.
This guide explains what happens when a will is declared invalid, how the estate is then distributed, what happens to any grant already issued, whether distributed assets can be recovered, and the different outcome when an Inheritance Act claim succeeds.
A successful will challenge — on grounds of lack of testamentary capacity, undue influence, lack of valid execution, fraud, or lack of knowledge and approval — results in a court order declaring the will invalid. The will has no legal effect.
This is a declaration that the document purporting to be the deceased's last will is not a valid will. It does not mean the estate is automatically distributed in the way the challenger wanted — it means the will that was challenged simply falls away.
For an overview of the grounds on which a will can be challenged, see our guide on the grounds for contesting a will.
Once the challenged will is declared invalid, the estate must be administered under whatever governs in its absence:
If the deceased made an earlier will that was not revoked (or that was not itself invalid), that will governs the estate. The executors named in the earlier will have authority to administer. The estate is distributed according to the earlier will's terms.
This can produce unexpected results. If an earlier will benefited different people from the challenged will, the outcome of a successful challenge may not benefit the challenger at all — it may simply benefit different beneficiaries under the earlier will. Anyone considering a will challenge should establish what the position would be if the challenge succeeded before committing to expensive litigation.
If there is no earlier valid will, the estate is distributed under the intestacy rules. This may or may not benefit the challenger depending on their relationship to the deceased.
For example, an unmarried partner who challenges the deceased's will successfully may find that the intestacy rules — which give nothing to unmarried partners — leave them no better off than the invalid will. In such cases, the Inheritance Act 1975 may need to be used alongside the will challenge. For the intestacy rules, see our guide on what happens if there is no will.
Not every will challenge results in the entire will being declared invalid. Partial invalidity is possible:
Partial invalidity is more likely in undue influence cases where the alleged influence was directed at specific provisions, rather than in capacity cases where the deceased either had testamentary capacity at the relevant time or did not.
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If a Grant of Probate was issued based on the now-invalid will, it will be revoked by the Probate Registry once the court order declaring the will invalid is received. A new grant — either under the earlier valid will or as letters of administration in intestacy — will then be issued to the appropriate person.
This is a significant procedural step. The executor under the invalid will loses their authority to act from the date the grant is revoked. Any actions taken by that executor between the date of the original grant and revocation are not automatically invalid — acts done in good faith before revocation may be protected.
For the general probate process, see our guide to applying for probate and our complete UK probate guide.
If assets have already been distributed under the now-invalid will, those distributions were made without authority. In principle, the recipients hold the assets on constructive trust for the true beneficiaries and are required to return them.
In practice, recovery is difficult:
This is one of the most important reasons to enter a caveat immediately when a will challenge is contemplated — preventing the estate from being distributed under the challenged will avoids the difficult recovery issue entirely. See our guide on how to enter a caveat.
A successful Inheritance Act 1975 claim has a different outcome from a successful will validity challenge. The will remains valid — it is not declared invalid. Instead, the court makes an order for reasonable financial provision to be made from the estate for the applicant.
The court's orders can include:
The estate is reduced by the amount of any order, which comes at the expense of the other beneficiaries. For a full guide to Inheritance Act claims, see our guide on Inheritance Act 1975 claims.
Costs in contentious probate cases are in the court's discretion. A successful challenger will typically seek a costs order against the unsuccessful defendant. However:
For the full picture on costs, see our guide on costs in contentious probate.
For the full contentious probate picture, see our introduction to contentious probate.
For the estate administration once the challenge is resolved, see our estate administration checklist. For the documents involved in probate, see our guide on what documents you need for probate.
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