A will in England and Wales needs two witnesses. Not one, not three - two, both watching you sign at the same time, and both signing themselves while you watch. That single sentence is the rule, and it's the rule that catches out more home-made wills than anything else.
This guide explains exactly what the law requires, why it's written that way, and the practical mistakes that turn a perfectly sensible will into an invalid one at probate.
The legal rule, in plain English
The witness requirement is set out in section 9 of the Wills Act 1837, which still governs how wills are made today. It says a will is valid only if:
- It is in writing.
- The testator (you) signs it - or someone else signs in your presence and at your direction.
- You sign (or acknowledge your signature) in the presence of two witnesses, both present at the same time.
- Each of those witnesses then signs, or acknowledges their signature, in your presence.
That last part - "both present at the same time" - is what trips people up. The law isn't satisfied with you signing in front of one person on Tuesday and another on Friday. Both witnesses must be in the room, watching, when you sign. Then both must sign in front of you.
It's the kind of thing the Trusted Hands will builder handles with a clear step-by-step witness guide so you don't accidentally invalidate your own will.
Why two? The historical reason
The two-witness rule has been around since 1837 because witness evidence is what proves a will is genuine when probate is challenged. One witness is one person's word; two is corroboration. If a will is later contested - someone claiming you didn't sign it, or that you were pressured into signing - the witnesses are the people the court calls on to confirm what they saw.
That's also why the witness signs are not just decorative. They're a sworn statement, in effect, that they saw you sign of your own free will and that you appeared to know what you were doing.
Who can witness a will?
The legal bar is low:
- Aged 18 or over.
- Of sound mind (mental capacity to understand what they're witnessing).
- Able to see the testator sign - so a witness who is registered blind cannot lawfully witness a will signing in the usual sense, because they cannot attest to having seen the signature being made.
- Not a beneficiary of the will, and not married to or in a civil partnership with a beneficiary. This is the big one - covered in our dedicated guide on who cannot witness.
Beyond that, any adult will do. Neighbours are a classic choice. So are colleagues, friends from outside the family, or staff at a bank or post office (some branches will witness on request).
What happens if a beneficiary witnesses the will?
This is the most common, and most painful, witnessing mistake. Section 15 of the Wills Act 1837 says that if a beneficiary (or their spouse or civil partner) witnesses your will, the gift to that beneficiary fails. The will itself usually still stands; the witness's signature is still valid; but anything left to them in the will is treated as if it had never been there.
So if you leave £50,000 to your daughter and your daughter signs as a witness, that £50,000 falls back into the residuary estate and is shared out among the rest of your beneficiaries instead. She gets nothing.
The rule exists to stop people pressuring beneficiaries into providing witness signatures - because the beneficiary has an obvious interest in the will being valid. The fix is straightforward: pick witnesses who have no financial interest in the will at all.
For more on the kinds of small mistakes that can destabilise an otherwise valid will, see our will mistakes guide.
What about three witnesses, or four?
The rule is a minimum of two. There's no harm in having three present (perhaps if you're not sure one witness is the right age - though you should have checked) but only two need to sign in the witness box. Some testators in care homes or hospitals end up with two staff witnesses as a matter of convenience, and that's fine, provided they aren't beneficiaries.
If a witness signs and is later found to have been a beneficiary, having a second non-beneficiary witness usually saves the will - section 15 has been read by the courts to allow a beneficiary's gift to survive if the will would still have been validly executed by the other witness alone. But you don't want to rely on that. Pick clean witnesses from the start.
The signing meeting itself - how to do it
This is where most home-drafted wills go wrong. The simplest reliable approach:
- Get two adult witnesses who are not beneficiaries (and not married to beneficiaries) into the same room as you, along with the printed will.
- Have them watch you sign and date the will at the bottom of the last page (and initial each other page if your will provider asks for it).
- Without leaving the room, hand the will to the first witness. They write their full name, sign, and add their address and occupation in the witness box.
- Hand the will to the second witness. They do the same.
- Everyone has been in the same room throughout. Nobody has left, taken a phone call in another room, or "popped out". The will is now validly executed.
Keep it that simple. Don't sign in advance. Don't post the will to the witnesses. Don't sign over a video call (we cover this below).
> Want a calmer way to handle this? Trusted Hands gives you the will, the witness sheet and a clear signing guide - all in one place. Start your will free → and only pay when you download.
Can witnesses sign over video call?
In general, no - not now. The temporary measures introduced during the pandemic that allowed remote video witnessing applied only to wills signed between 31 January 2020 and 31 January 2024 in England and Wales, and that window has closed. As of 2026, witnessing must be done in person, in the same physical space.
There has been talk of making remote witnessing permanent, but until and unless the law is changed, you should treat in-person, same-room witnessing as the only safe route.
What if you can't sign yourself?
Section 9 allows someone else to sign on your behalf - but only "in your presence and at your direction". So if you're physically unable to hold a pen, another person can sign for you, with you watching, and the two witnesses watching both of you. That third person should not be a beneficiary either, for the same reason as the witnesses.
For complex estates, we recommend you seek assistance from a Trusted Hands Advisor or your own legal advice.
> Ready to start your will? Trusted Hands turns these decisions into a 15-30 minute guided builder. Start free → — only pay when you download.
Frequently asked questions
Can my partner or spouse witness my will?
If your partner is a beneficiary in the will (which is almost always the case), then no - section 15 of the Wills Act 1837 means their gift would fail. If they aren't a beneficiary at all, they can technically witness, but it's much cleaner to use a non-family witness.
Does the witness need to read the will?
No. They are witnessing your signature, not the contents. They don't need to know what's in the will and you don't have to show them. They just have to see you sign, and you have to see them sign.
Do witnesses need to keep records?
Not formally. Their name, address and occupation in the witness box is enough. But it helps if your executors know who the witnesses are - in the rare event the will is contested years later, the witnesses may need to be tracked down.
Can a witness later change their mind?
No. Witnessing isn't consenting to anything ongoing - it's attesting that you signed. Once they've signed the witness box, they can't "withdraw". A witness can be called as a witness in court if the will is contested, but they can't unwind their attestation.
What happens if my will is signed with only one witness?
It is invalid. The estate is treated as intestate (as if there were no will at all), and the law's default rules apply. We cover the consequences of an invalid will in our will mistakes guide - it's an avoidable disaster.
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