
Does a Name Change Affect My National Insurance Number?
Does a name change affect your National Insurance number? Learn whether your NI number changes, how to update HMRC and what to do after changing your name.
Does a name change affect your will? Learn what happens after a deed poll, marriage or divorce, when to update your will, and how to avoid probate confusion.

For most people in England and Wales, changing your name by itself does not automatically cancel or invalidate an existing will. The Wills Act 1837 sets out particular ways in which a will can be revoked, and simply adopting a different name is not one of them.
That means a will made when you were known as Charlotte Louise Harris does not normally stop being your will simply because you later become Charlotte Louise Morgan.
However, that does not mean you should forget about the document.
Leaving a will permanently in your previous name could create additional questions for your executors after your death, especially if your bank accounts, property, passport and other assets are all held in your new name.
More importantly, sometimes the event that caused your name to change—such as marriage, civil partnership or divorce—can affect your will far more significantly than the name change itself.
This guide explains the difference and what you should consider doing.
Important: This article provides general information primarily about England and Wales. Scotland and Northern Ireland have different succession rules. If your will or estate is complicated, professional legal advice may be appropriate.
Usually, no.
A straightforward change of name does not normally revoke an otherwise valid will.
Section 20 of the Wills Act 1837 deals with revocation of wills and recognises methods such as making another will or codicil, executing an appropriate written revocation, or deliberately destroying the will with the intention of revoking it. A simple change of personal name is not itself a method of revocation.
Imagine you signed your will ten years ago as:
Daniel Robert Taylor
You later change your name by deed poll to:
Daniel Robert Hughes
The fact that the original will says “Daniel Robert Taylor” does not normally make it cease to be your will.
Instead, the practical question becomes whether your executors can clearly establish that Daniel Robert Taylor and Daniel Robert Hughes are the same person.
That is where good record-keeping becomes important.
Having an old name on a will is not necessarily unusual or impossible to deal with.
People can change their names many times during their lives through deed poll, marriage, divorce or other circumstances.
The probate system specifically recognises that a person who dies may have been known by more than one name. HMCTS probate application paperwork asks whether the deceased was known by another name in which they held assets.
This means executors can encounter situations where, for example:
Will: Catherine Ann Foster
Death certificate: Catherine Ann Williams
Property: Catherine Ann Foster
Bank account: Catherine Ann Williams
The different names do not necessarily mean there are four different people.
But your executors may need documentary evidence explaining the connection.
A deed poll, marriage certificate or other legitimate name-change document can therefore become an important part of the estate paperwork.
Changing your name by deed poll does not normally invalidate your existing will simply because the will contains your former name.
GOV.UK describes a deed poll as a document used to evidence a change of name.
Suppose your will says:
“I, Andrew Michael Collins…”
and you later make a deed poll and become:
Andrew Michael Bennett.
Your deed poll provides an evidential link between those identities.
Even so, this is a good opportunity to review your will.
The question is not only:
“Is my old will still valid?”
A better question is:
“Does my existing will still clearly express what I want to happen?”
A will can remain legally relevant while becoming increasingly outdated in practical terms.
It can be sensible, although a new will is not necessarily required solely because your name changed.
GOV.UK recommends reviewing a will every five years and after major life changes. It specifically identifies events including marriage, separation or divorce, having a child, moving home and the death of an executor.
A name change gives you a natural opportunity to perform the same review.
Look beyond the name printed on the first page.
Ask yourself whether the people named as executors are still appropriate, whether the beneficiaries remain correct, whether major gifts still make sense, whether your family situation has changed and whether property referred to in the document still belongs to you.
If everything else remains correct, the old name may primarily be an identification issue.
If several things are outdated, creating a current will may be much clearer.
If your surname changed because you got married, the marriage itself is the crucial issue—not simply the new surname.
Under the current law in England and Wales, marriage will generally revoke an existing will, subject to important statutory exceptions. GOV.UK similarly warns that if you already have a will when you marry, it will usually become invalid.
This rule remains in force as of August 2026. Although the Law Commission has recommended reforming the law so that marriage would no longer automatically revoke a will, that recommendation has not itself replaced the current statutory rule.
Suppose you made a will while you were:
Sophie Evans
and later married and became:
Sophie Khan.
It would be a mistake to concentrate only on changing “Evans” to “Khan” in the will.
You need to establish what effect the marriage itself had on the existing will.
There are exceptions, including circumstances involving a will made in contemplation of a particular marriage, so anyone relying on such an exception should consider professional advice rather than assuming the outcome.
A similar warning applies if your name change happened when you formed a civil partnership.
Current GOV.UK guidance states that an existing will will usually become invalid when a person marries or forms a civil partnership. HMRC guidance also explains that formation of a civil partnership generally revokes an existing will, subject to relevant exceptions.
Again, the legal relationship change is more significant than the surname change.
If you adopted your civil partner's surname, do not simply treat the matter as an administrative name update.
Review the will itself.
Divorce creates another distinct situation.
Perhaps you were originally:
Rachel Jane Morris
then became:
Rachel Jane Lewis
after marriage, and after divorce returned to:
Rachel Jane Morris.
Changing your surname back does not itself determine what happens to your will.
The divorce is the legally significant event.
HMRC's current inheritance guidance explains that in England and Wales divorce, annulment or dissolution of a civil partnership can cause provisions in a will relating to the former spouse or civil partner to lapse rather than simply cancelling the whole will.
This is why GOV.UK recommends reviewing a will after separation or divorce.
If your name change followed a divorce, look closely at who is named as an executor, who receives property or money, whether your former spouse appears in any trusts, and whether your current wishes are accurately reflected.
Simply changing your surname on documents does not perform that estate-planning review for you.
No. This is a particularly important mistake to avoid.
GOV.UK states that you cannot simply amend a will after it has been signed and witnessed. Formal changes can instead be made using a codicil, and major changes should generally be made through a new will.
So do not take your original will and:
cross out your former surname, write your new surname above it, add new beneficiaries in the margin, remove paragraphs, or otherwise alter the signed document yourself.
Even when the intended change seems obvious, handwritten alterations can create uncertainty about when they were made and whether they form part of the legally effective will.
A codicil is a formal document that changes an existing will without replacing the entire will.
According to GOV.UK, a codicil must be signed and witnessed in the same way as a will. There is no specified limit on the number of codicils that can be made, although GOV.UK recommends making a new will where substantial changes are required.
Whether you actually need a codicil purely for a name change depends on your circumstances.
For someone whose only change is a straightforward deed-poll name change, preserving good evidence of the identity link may sometimes be enough.
If the document has several outdated details, a new will can be cleaner and easier for future executors to understand.
A new will deserves serious consideration if your name change happened alongside other major changes.
Examples might include getting married, forming a civil partnership, getting divorced, having children, buying or selling substantial property, changing the people you want as executors, changing beneficiaries, or experiencing a significant change in your financial position.
GOV.UK recommends a new will for major changes and says the new document should explain that it revokes earlier wills and codicils.
This approach also avoids creating an increasingly complicated bundle made up of an old will plus several codicils.
Clarity matters because eventually someone other than you will have to interpret these documents.
Your will is only one part of the picture.
If you own registered property in England or Wales and your name has changed, HM Land Registry has a procedure for updating the register. Current guidance allows evidence of a name change such as a deed poll, statement of truth or statutory declaration in relevant circumstances.
Keeping major records consistent can simplify administration.
For example, if your will, Land Registry title, bank records and passport all contain different versions of your name, your executors may have more connections to establish.
That does not necessarily make your estate impossible to administer, but maintaining an organised record of previous names and the documents linking them can help.
The person whose name changes may not be you.
Suppose your will says:
“I leave £10,000 to my niece, Hannah Rose Thompson.”
Years later Hannah changes her surname to:
Hannah Rose Patel.
A change of name does not turn Hannah into a different person. The practical issue is identifying the beneficiary described in the will.
Where the relationship and identity are perfectly clear, the change may be relatively straightforward to establish.
However, ambiguity becomes more important when several people have similar names, a beneficiary is described only by name, or family circumstances have changed substantially.
This is another reason periodic will reviews are useful.
The same basic identification issue can arise if your executor changes their name.
GOV.UK confirms that where there is a will, an executor named in the will or a codicil can apply for probate.
A later change of surname does not create a new human being, but the executor may need to demonstrate the link between the name in the will and their current identity.
If your executor has also moved, died, become unable to act, or is no longer the person you want handling your affairs, that is a stronger reason to revisit the will.
It is sensible to keep evidence of significant name changes safely with, or easily traceable from, your important estate records.
That does not necessarily mean physically attaching documents to the original will.
Instead, make sure your executors know where the important paperwork can be found.
Useful records may include your deed poll, marriage or civil partnership certificate, divorce documentation where relevant, details of previous names used for financial accounts, and information about assets that have not yet been updated into your current name.
HMCTS probate forms specifically accommodate other names under which a deceased person held assets, so maintaining that paper trail can be useful to whoever eventually administers your estate.
After changing your name, check the following:
Confirm why your name changed and whether marriage, civil partnership or divorce also affects your will.
Review the beneficiaries and executors rather than checking only your name.
Keep reliable evidence connecting your previous and current names.
Check whether major assets, including property, remain registered in your former name.
Do not handwrite alterations onto the signed original will.
Consider whether a properly executed codicil is appropriate for a limited change.
Consider making a new will if your circumstances or wishes have changed substantially.
Make sure your executors know where your current will and relevant name-change documents are stored.
Review your will periodically and after major changes in your life.
GOV.UK currently recommends reviewing a will every five years and following major life changes.
A name change on its own does not normally revoke an otherwise valid will in England and Wales. The Wills Act specifies methods by which wills can be revoked, and an ordinary change of name is not itself one of them.
Potentially, yes. The use of a previous name does not by itself mean a will becomes invalid. Probate procedures expressly recognise that deceased people may have been known by additional names and may have held assets under those names.
Not simply because of the deed-poll name change. Keep the deed poll because it provides useful evidence connecting your old and new names.
Not necessarily solely because your name changed. However, it is sensible to review the will and consider whether other circumstances have changed. GOV.UK recommends regular reviews and reviews following major life events.
Yes. Under current England and Wales rules, marriage will usually revoke an existing will, subject to statutory exceptions. GOV.UK also explicitly warns that an existing will will usually become invalid after marriage.
Yes. Current guidance says an existing will will usually become invalid when you form a civil partnership, subject to relevant exceptions.
Not generally. Divorce can instead affect provisions relating to your former spouse. HMRC guidance explains that relevant parts may lapse following divorce, annulment or dissolution of a civil partnership.
No. Do not write changes directly onto a signed and witnessed will. GOV.UK says formal alterations should be made through a codicil, while significant changes normally justify a new will.
A name change does not make the beneficiary a different person, but clear identification may eventually be required. If the wording could create ambiguity, reviewing the will can help avoid uncertainty.
If registered property is still recorded under your previous name, HM Land Registry provides a procedure for updating the register and accepts appropriate name-change evidence such as a deed poll in relevant cases.
So, does a name change affect my will?
In most straightforward cases, a change of name alone does not automatically invalidate an existing will in England and Wales.
If your old will says David Clarke and you now legally use David Morgan, the central issue is usually proving that both names identify the same person—not that the will automatically disappeared when your name changed. The probate process itself recognises situations in which people held assets or were known under different names.
However, the reason your name changed matters enormously.
A deed-poll name change is very different from a surname change following marriage. Marriage or formation of a civil partnership will usually invalidate an earlier will under the current rules, subject to exceptions. Divorce can also change how provisions involving a former spouse operate.
For that reason, treat a name change as an opportunity to review the whole document.
Do not simply ask whether your new surname appears on the will.
Ask whether the executors are still right, the beneficiaries are still right, your assets have changed, your relationships have changed, and the will still represents what you actually want.
And if you decide the document needs changing, do not write over the signed original. Use a properly executed codicil for an appropriate limited alteration or make a new will for major changes.
A clear will supported by an organised record of your former and current names can make things considerably easier for the people who eventually have to administer your estate.