Who can witness a signature in the UK?

The general rule, an independent adult who is not a party

Witnessing a signature is not a reserved legal activity. Section 12 of the Legal Services Act 2007 lists all 6, from rights of audience to the administration of oaths, and watching someone sign is on none of them. No qualification is needed, and no solicitor.

The witness has to be independent. HM Land Registry’s practice guide 8 on the execution of deeds says a party to a deed cannot witness another party’s signature, on the authority of Seal v Claridge (1881), advises a witness no younger than 18, and calls a signatory’s spouse, civil partner or cohabitee best avoided even where the legislation permits it.

Practice can be stricter than the statute. gov.uk says a deed poll you make yourself needs 2 witnesses aged 18 or over, and that some organisations reject one where a witness lives at the same address or is a close relative.

Who can witness which document

Document	Witnesses	Ruled out	The rule
Deed signed by an individual	1, or 2 if signed at the signatory’s direction	Any party to the deed	1989 Act, s 1(3)
Document executed by a company	1 if one director signs, none if 2 signatories do	n/a	Companies Act 2006, s 44(2)
Will in England and Wales	2, present at the same time	A beneficiary or their married partner loses the gift	Wills Act 1837, ss 9 and 15
Will in Northern Ireland	2, present at the same time	A beneficiary, their spouse or civil partner loses the gift	1994 Order, arts 5 and 8
Will in Scotland	1, though the will is valid without one	Under 16, or a stranger to the granter	1995 Act, ss 2 and 3
Lasting power of attorney	1 per signature	The donor, and any attorney witnessing the donor	2007 Regulations, reg 9(8)
Statutory declaration	None, it is sworn or affirmed	n/a	1835 Act, s 18

Deeds, the 1989 Act and the physical presence rule

Section 1(3) of the Law of Property (Miscellaneous Provisions) Act 1989 treats a deed as validly executed by an individual only where it is signed in the presence of a witness who attests it, or at the signatory’s direction before 2 witnesses who each attest, and then delivered as a deed. Signing includes making a mark, so a witnessed cross is a signature.

Presence means presence. The Law Commission concluded in 2019 that signing before a witness requires physical presence even where both parties sign electronically, and HM Land Registry still requires the witness to be actually present, though the two may be separated by glass, so a signature witnessed through a car window counts.

One witness can take every signature on a deed, but each must be separately attested unless the attestation wording covers all of them. A declaration of trust over a jointly owned property and the transfer deed that moves a name on or off a title both run on that rule.

What the witness has to write, name, address and postcode

HM Land Registry requires the witness’s name and address on the deed in legible form and complete, including the postcode, because that is how a witness is traced if execution is questioned years later. A lasting power of attorney asks for the same under regulation 9(9), a signature plus a full name and address.

Neither asks the witness to read the document. A witness is evidence of who signed, not of what was signed.

Wills, 2 witnesses and the section 15 beneficiary trap

Section 9 of the Wills Act 1837 requires the testator’s signature to be made or acknowledged in the presence of 2 or more witnesses present at the same time, and each witness to attest and sign the will, or acknowledge their signature, in the presence of the testator but not necessarily of the other witness. No form of attestation is necessary.

gov.uk adds that both witnesses must be over 18, everyone signs the same document, the testator and each witness need a clear view of one another signing, and the 2 witnesses need not sign at the same moment.

The expensive rule is section 15. A beneficial gift to a person who attests the will, or to that person’s husband or wife, is null and void, though the will stands and the witness is still admitted to prove execution. Civil partners came inside it on 5 December 2005. Section 1 of the Wills Act 1968 is the rescue, disregarding that attestation where the will was duly executed without it, so a third independent witness saves the legacy. Executors may witness under section 17, a charged creditor under section 16.

Section 9(2) extended presence to videoconference only for wills made on or after 31 January 2020 and on or before 31 January 2024, and that window has closed, so a will now needs 2 witnesses in the room.

Where a will carries no attestation clause, rule 12 of the Non-Contentious Probate Rules 1987 makes the registrar demand an affidavit or witness statement of due execution from an attesting witness before probate, which is why a traceable address earns its place.

Lasting powers of attorney and the regulation 9(8) witness ban

Regulation 9 of the 2007 regulations has the donor and each attorney sign in the presence of a witness, with 2 witnesses where someone signs at the donor’s or an attorney’s direction. Regulation 9(8) draws the line. The donor may not witness any signature required for the power, and an attorney may not witness any signature apart from that of another attorney.

gov.uk requires witnesses and certificate providers to be 18 or over, bars an attorney from also signing as the certificate provider, and has everyone sign the same original document rather than a copy. The Powers of Attorney Act 2023 rewrites the process, but its commencement section leaves section 1 prospective, so the 2007 rules are the live ones.

Statutory declarations, sworn not witnessed, and the £5.00 fee

A statutory declaration has no witness at all. Section 18 of the Statutory Declarations Act 1835 lets a justice of the peace, notary public or other officer authorised to administer an oath take a declaration in the statutory form, and taking it is the administration of an oath, reserved under Schedule 2 to the Legal Services Act 2007.

That is why a declaration costs money when a witnessed signature does not. The Commissioners for Oaths (Fees) Order 1993 fixes £5.00 for taking an affidavit, declaration or affirmation from each person making it, plus £2.00 for each exhibit that has to be marked, inclusive of VAT where payable.

The figure is set by order rather than by the firm, so a declaration sworn at a high street office in Birmingham costs the same as one sworn in the City of London, and every solicitor taking one in England and Wales is regulated by the Solicitors Regulation Authority. The person who certifies a copy of a document is confirming that the copy matches the original, not watching anyone sign.

Passport countersignatures and the 2 year rule

gov.uk requires the countersignatory to have known the applicant, or the adult who signed for a child under 16, for at least 2 years, as a friend, neighbour or colleague rather than only professionally, and to be of good standing or in a recognised profession.

They cannot be related to the applicant by birth or marriage, in a relationship with them, or living at the same address, and a UK application needs one with a current British or Irish passport. They sign and date the certifying wording on the back of one photo, while the applicant signs nothing.

Witnessing in Scotland, 1 witness and the self-proving rule

Scotland runs on the Requirements of Writing (Scotland) Act 1995. The signatory is the granter and they subscribe, meaning they sign at the end of the last page. One witness, not 2, and under section 2(1) a document caught by section 1(2), which includes any will, is formally valid on the granter’s subscription alone.

The witness does a different job. Section 3(1) makes the document self-proving, or probative, where it bears the granter’s subscription, one witness’s signature, and that witness’s name and address. Section 3(4) defeats that presumption where the witness is named as a granter, did not know the granter, was under 16, was mentally incapable, did not actually see the subscription, signed before the granter, or where signing and witnessing were not one continuous process. Section 3(3) allows the name and address to be added later, up to the point the document is founded on in court or registered.

A testamentary document of more than one sheet carries the presumption only where the granter signed every sheet, and testamentary capacity starts at 12 rather than 18. The witness earns their keep at registration, because section 6 bars a document from the Books of Council and Session without that presumption, with testamentary documents among the stated exceptions.

Powers of attorney sit outside all of it. Section 15(3) of the Adults with Incapacity (Scotland) Act 2000 wants a certificate rather than a witness, from a practising solicitor or another prescribed class who interviewed the granter immediately before subscription and who, under section 15(4), is not the attorney. That solicitor answers to the Law Society of Scotland.

Witnessing in Northern Ireland, the 1994 Order and enduring powers

Northern Ireland arrives at nearly the same place through its own statutes, and those are what a Belfast reader has to check. Wills run on Article 5 of the Wills and Administration Proceedings (Northern Ireland) Order 1994, which needs the signature made or acknowledged before 2 or more witnesses present at the same time, each attesting in the presence of the testator.

The beneficiary trap is Article 8 rather than section 15, naming the spouse or civil partner on its own face, and Article 8(3) carries the same rescue where the will is duly executed without that attestation. Articles 7, 9 and 10 cover later incompetence, charged creditors and executors, as sections 14, 16 and 17 do in England.

Deeds run on Article 3 of the Law Reform (Miscellaneous Provisions) (Northern Ireland) Order 2005, which mirrors the 1989 Act, and section 44 of the Companies Act 2006 applies under Northern Irish law too.

Powers of attorney are the sharp divergence, because Northern Ireland has no lasting power of attorney. The enduring power under the 1987 Order is still the instrument, registered with the High Court, Office of Care and Protection, once the attorney believes the donor is losing capacity, and the firms handling that registration answer to the Law Society of Northern Ireland.