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Information Needed To Prepare A Codicil In The United Kingdom

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This structured guide explains the key details needed to prepare a codicil, helping readers update a will accurately and efficiently. For related resources, visit AI Generated British Codicil.
Information Item
Reason Needed
Requirement Level
Where To Find It
Accuracy Importance
Existing will details
Date of the existing will
Identifies the will being amended.
Usually required
First page or signing page of the will.
High
Personal details
Full name in the existing will
Confirms the testator’s identity.
Usually required
Opening clause of the will.
High
Current full legal name
Shows who is making the codicil now.
Usually required
Passport, driving licence or deed poll.
High
Previous or alternative names
Links changed names to the will.
Sometimes required
Marriage certificate, deed poll or divorce papers.
High
Current residential address
Updates identification and domicile context.
Usually required
Utility bill, bank statement or council tax bill.
High
Existing will details
Address stated in the existing will
Helps match the codicil to the will.
Sometimes required
Opening clause of the will.
Medium
Signing details
Country where codicil will be signed
Signing rules differ across UK jurisdictions.
Usually required
Planned signing location.
High
Existing will details
Jurisdiction stated in the will
Shows which law the will refers to.
Sometimes required
Governing law or interpretation clause.
High
Location of the original will
Codicil should be stored with it.
Usually required
Solicitor, bank, probate registry or home safe.
High
Whether the will is signed
A codicil amends a valid executed will.
Usually required
Signature page of the will.
High
Number of earlier codicils
Avoids conflicts with existing amendments.
Usually required
Documents stored with the will.
High
Dates of earlier codicils
Identifies amendments being confirmed or changed.
Sometimes required
Top or signing page of each codicil.
High
Whether earlier codicils remain valid
Clarifies the current testamentary scheme.
Sometimes required
Earlier codicils and revocation wording.
High
Clause number to change
Targets the exact provision being amended.
Usually required
Numbered clauses in the will.
High
Existing wording to remove
Prevents uncertainty about deleted text.
Sometimes required
Relevant clause in the will.
High
Gift details
Replacement wording required
States the new legal effect.
Usually required
User instructions or solicitor notes.
High
Existing will details
Confirmation of unchanged will terms
Confirms all other clauses still apply.
Usually required
User instructions and existing will.
High
Personal details
Date of birth
Useful extra identity check.
Optional
Passport, birth certificate or driving licence.
Medium
Marital or civil partnership status
Marriage or divorce may affect wills.
Sometimes required
Marriage, civil partnership or decree absolute records.
High
Marriage after the will date
Marriage can revoke an earlier will.
Sometimes required
Marriage or civil partnership certificate.
High
Divorce or dissolution after the will date
May affect gifts and executor appointments.
Sometimes required
Final order or decree absolute.
High
Signing details
Any capacity concerns
Capacity affects validity and challenge risk.
Sometimes required
Medical records or GP assessment notes.
High
Ability to read and understand English
May require reading-over or translation evidence.
Sometimes required
User confirmation or interpreter details.
High
Visual or physical signing difficulties
May require special attestation wording.
Sometimes required
User confirmation or medical notes.
High
Executor details
Executor to remove
Identifies appointment being revoked.
Sometimes required
Executor clause in the will.
High
New executor full name
Appoints the correct person.
Sometimes required
Executor’s passport or formal ID.
High
New executor address
Helps locate and identify executor.
Sometimes required
Executor’s utility bill or bank statement.
Medium
Executor relationship to testator
Aids identification and suitability checks.
Optional
User instructions.
Medium
Professional executor firm details
Correctly names a firm or partner.
Sometimes required
Engagement letter or firm website.
High
Substitute executor details
Provides backup if first executor cannot act.
Sometimes required
User instructions and substitute’s ID.
High
Executor’s willingness to act
Reduces risk of later refusal.
Optional
Written or verbal confirmation from executor.
Medium
Beneficiary details
Beneficiary to remove
Identifies gift or share being revoked.
Sometimes required
Relevant gift clause in the will.
High
New beneficiary full name
Identifies who receives the gift.
Sometimes required
Beneficiary’s ID or birth certificate.
High
Beneficiary address
Helps identify and locate beneficiary.
Sometimes required
Beneficiary’s utility bill or correspondence.
Medium
Beneficiary date of birth
Distinguishes people with similar names.
Optional
Birth certificate or passport.
Medium
Beneficiary relationship to testator
Clarifies identity and intended gift context.
Sometimes required
User instructions or family records.
Medium
Charity’s official name
Avoids naming the wrong charity.
Sometimes required
Charity Commission register.
High
Charity registration number
Uniquely identifies a charitable beneficiary.
Sometimes required
Charity Commission register.
High
Company beneficiary registered details
Identifies a corporate beneficiary accurately.
Sometimes required
Companies House register.
High
Whether a named beneficiary has died
May require substitute gift wording.
Sometimes required
Death certificate or family confirmation.
High
Whether beneficiary is under 18
May require trust or age-contingent wording.
Sometimes required
Birth certificate or family records.
High
Signing details
Whether a beneficiary will witness
Gifts to witnesses may be void.
Usually required
Compare beneficiary list with witness names.
High
Whether beneficiary’s spouse will witness
Their gift may be void.
Usually required
Witness relationship checks.
High
Gift details
Type of gift changed
Determines wording for cash, item or share.
Usually required
Relevant clause and user instructions.
High
Cash gift amount
States the exact legacy value.
Sometimes required
User instructions or financial plan.
High
Currency of cash gift
Avoids uncertainty for non-sterling gifts.
Sometimes required
User instructions or account records.
High
Specific item description
Identifies the item being gifted.
Sometimes required
Valuation, receipt, photograph or inventory.
High
Property address for gifted land
Identifies land or home being gifted.
Sometimes required
HM Land Registry title register.
High
Land Registry title number
Precisely identifies registered property.
Sometimes required
HM Land Registry title register.
High
Whether gifted property is jointly owned
Joint ownership can affect what passes by will.
Sometimes required
Title register and ownership documents.
High
Share of residue changed
Ensures residue shares total correctly.
Sometimes required
Residue clause and user calculations.
High
Beneficiary details
Substitute beneficiary for a gift
States who benefits if first choice fails.
Sometimes required
User instructions.
High
Gift details
Conditions attached to gift
Defines when the gift is payable.
Sometimes required
User instructions or existing clause.
High
Age condition for beneficiary
Specifies when minor or young adult inherits.
Sometimes required
User instructions or trust clause.
High
Whether gift is tax-free to beneficiary
Clarifies who bears inheritance tax burden.
Sometimes required
Existing tax clause or tax advice.
High
Funeral wishes to add or change
Updates non-binding wishes in the will.
Optional
User instructions or funeral plan.
Medium
Beneficiary details
Guardian appointment change
Updates care arrangements for minor children.
Sometimes required
Existing guardian clause and user instructions.
High
New guardian name and address
Identifies proposed guardian accurately.
Sometimes required
Guardian’s ID and address evidence.
High
Executor details
Trustee appointment change
Updates who manages trusts under the will.
Sometimes required
Trustee or executor clauses.
High
New trustee full details
Identifies replacement or additional trustee.
Sometimes required
Trustee’s ID and address evidence.
High
Gift details
Digital asset instruction change
Updates wishes for online accounts or assets.
Optional
Password manager inventory or account list.
Medium
Pet care gift or instruction
Updates provision for animals after death.
Optional
User instructions and pet records.
Medium
Mortgage or loan on gifted asset
Clarifies whether asset passes with debt.
Sometimes required
Mortgage statement or loan agreement.
High
Whether the gifted asset is still owned
Avoids gifts of assets no longer owned.
Sometimes required
Title records, receipts or account statements.
High
Signing details
Planned signing date
Dates the codicil and its priority.
Usually required
Signing appointment or calendar.
High
Place of signing
Useful evidence of execution circumstances.
Optional
Signing appointment details.
Medium
First witness full name
Required for valid attestation evidence.
Usually required
Witness’s ID.
High
Second witness full name
Required for valid attestation evidence.
Usually required
Witness’s ID.
High
Witness addresses
Helps locate witnesses if probate queries arise.
Usually required
Witness utility bill or correspondence.
High
Witness occupations
Traditional extra witness identification detail.
Optional
Witness confirmation.
Low
Witnesses are adults
Adult independent witnesses reduce challenge risk.
Usually required
Witness ID or confirmation.
High
Both witnesses present together
Required execution formality in England and Wales.
Usually required
Signing plan and witness availability.
High
Testator signs or acknowledges signature
Core requirement for valid execution.
Usually required
Signing ceremony checklist.
High
Witnesses sign or acknowledge signatures
Completes statutory attestation process.
Usually required
Signing ceremony checklist.
High
Intention that signature gives effect
Signature must be intended to validate document.
Usually required
Attestation clause and signing instructions.
High
Witnesses are independent
Reduces risk of failed gifts or disputes.
Usually required
Witness relationship checks.
High
Whether signing is remote or video-witnessed
Temporary video-witnessing rules have ended.
Sometimes required
Signing plan.
High
Attestation clause wording
Records compliance with signing formalities.
Usually required
Codicil template or solicitor draft.
High
Whether someone signs for testator
Allowed only if done by direction and presence.
Sometimes required
User instructions and signing plan.
High
Name of person signing for testator
Evidences signature by direction.
Sometimes required
Signer’s ID and signing notes.
High
Existing will details
Parts to revoke only
Avoids revoking more than intended.
Sometimes required
Relevant clauses and user instructions.
High
Number and complexity of changes
Complex changes may need a new will.
Usually required
List of intended amendments.
High
Gift details
Major asset changes since the will
May make old gifts inaccurate or impossible.
Sometimes required
Asset list, bank records or property records.
High
Executor details
Whether an executor has died
May require replacement executor appointment.
Sometimes required
Death certificate or family confirmation.
High
Executor name change
Keeps executor identification current.
Sometimes required
Marriage certificate or deed poll.
Medium
Beneficiary details
Beneficiary name change
Links current identity to named beneficiary.
Sometimes required
Marriage certificate or deed poll.
Medium
Signing details
Where codicil will be stored
Ensures codicil can be found with will.
Usually required
Storage provider or home safe details.
High
Executor details
Who will know codicil location
Helps executors find the latest documents.
Optional
Executor notification plan.
Medium

What Information Do You Need Before Making A Codicil In The UK?

A codicil should be prepared from the signed will, not from memory. The date of the existing will, the testator’s full name and address, and the exact clause or gift being changed are high-accuracy items because a codicil must clearly identify the will it amends and avoid accidental revocation or ambiguity.

When Is A Codicil Better Than Making A New Will?

A codicil is usually most practical for a limited change, such as replacing an executor, changing a specific gift, adding a beneficiary, or updating an address. If there are many changes, inconsistent clauses, marriage or divorce issues, or a major redistribution of the estate, making a new will is often safer than adding multiple codicils.

What Signing Details Matter For A UK Codicil?

For England and Wales, a codicil normally needs the same execution formalities as a will under section 9 of the Wills Act 1837: the testator signs or acknowledges the signature in the presence of two witnesses present at the same time, and each witness signs or acknowledges their signature in the testator’s presence. Witness names, addresses, occupations and independence should be checked before signing.

Why Do Beneficiary And Witness Details Need Care?

In England and Wales, a beneficiary, or the spouse or civil partner of a beneficiary, should not witness the codicil because gifts to that person may be void under section 15 of the Wills Act 1837. Collecting beneficiary relationship details and witness eligibility information helps reduce the risk of an intended gift failing.

Information Needed To Prepare A Codicil
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FAQs

To prepare a codicil, you usually need your full name, address, details of your existing will, the exact changes you want to make, executor details if affected, beneficiary details, asset descriptions, and signing witness information.
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References and Information Sources