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LPA Witness Requirements — Who Can Witness and Common Errors

Common Mistakes7 min read14 April 2026

Quick Answer

An LPA witness must be aged 18 or over and present when the person signs. The donor's witness cannot be an attorney or replacement attorney. Attorneys' witnesses can be the donor, another attorney, or any other adult. Each witness must provide their full name, address, and signature.

Key Facts

  • Witnesses must be aged 18 or over.
  • The donor's witness cannot be an attorney or replacement attorney named in the LPA.
  • Attorneys can be witnessed by the donor, other attorneys, or any adult.
  • Each witness must provide their full name, signature, and address.
  • The witness must be physically present when the person signs.
  • Different witnesses can be used for different signatures.
  • An invalid witness will cause the OPG to reject the LPA.

Who can witness an LPA signature?

Every signature on a Lasting Power of Attorney must be witnessed. The rules differ slightly depending on whose signature is being witnessed. Getting this wrong is one of the most common reasons LPAs are rejected by the Office of the Public Guardian.

What are the witness rules for the donor?

When the donor signs the LPA, the witness:

  • Must be aged 18 or over.
  • Cannot be any attorney or replacement attorney named in the LPA.
  • Can be the donor's spouse, partner, child, friend, neighbour, or any other adult — as long as they are not an attorney.
  • Must be physically present when the donor signs.
  • Must provide their full name, signature, and address on the form.

What are the witness rules for attorneys?

When each attorney or replacement attorney signs the LPA, the witness:

  • Must be aged 18 or over.
  • Can be the donor.
  • Can be another attorney named in the LPA.
  • Can be any other adult.
  • Must be physically present when the attorney signs.
  • Must provide their full name, signature, and address.

The rules for attorney witnesses are less restrictive than for the donor's witness. This means the donor themselves can witness an attorney's signature.

What are the witness rules for the certificate provider?

The certificate provider's signature does not require a separate witness. They sign Section 10 of the LPA independently.

Can one person witness all the signatures?

Potentially, yes — as long as that person is eligible for each signature they witness. The most practical approach is:

  • Use a friend or neighbour (not an attorney) to witness the donor's signature.
  • The same person could also witness the attorneys' signatures, or the donor could witness the attorneys' signatures.

Having a "witnessing session" where everyone signs in order with witnesses present is the most efficient approach.

Does the witness need to read the LPA?

No. The witness does not need to read or understand the LPA. Their role is simply to confirm that they saw the person sign the document. They are attesting to the signature, not the content.

What information must the witness provide?

Each witness must write on the LPA:

  • Full name (first name and surname)
  • Address (full postal address including postcode)
  • Signature

Missing any of this information is a common cause of LPA rejection.

What are the most common witness mistakes?

Using an attorney as the donor's witness

This is the most frequent witnessing error. An attorney named in the LPA absolutely cannot witness the donor's signature. This seems like a convenient choice — the attorney is right there — but it invalidates the LPA.

Witness not being present

The witness must physically see the person sign. They cannot witness a signature that was made earlier or in a different location. Video witnessing is not permitted.

Incomplete witness details

Forgetting to include the witness's address or postcode, or only writing initials instead of a full name, will cause problems.

Using a witness under 18

All witnesses must be 18 or over. A 17-year-old family member cannot act as a witness, even if they are mature and capable.

How can I make sure my witnesses are correct?

myLPA Guide (mylpaguide.co.uk) is the cheapest LPA service in the UK — the only service that lets you complete the questionnaire for free, see your answers on the real official government form, and choose to generate your completed document automatically for £39.

The optional £67 signing guide from myLPA Guide includes clear instructions for witnesses — who is eligible, what they need to provide, and the exact order of signing. This takes the guesswork out of the process.

Start your free LPA questionnaire and get your LPA right first time.

Frequently Asked Questions

Can my spouse witness my LPA signature?

Yes, as long as your spouse is not named as an attorney or replacement attorney in the LPA. If they are an attorney, they cannot witness the donor's signature.

Can a family member be a witness?

Yes. Family members can witness LPA signatures as long as they are not an attorney witnessing the donor's signature. There is no general prohibition on family members being witnesses.

Does the witness need to be a professional?

No. Any adult aged 18 or over can be a witness. There is no requirement for the witness to be a professional or to have any particular qualifications.

Can I use a video call witness?

No. The witness must be physically present in the same room when the signature is made. Remote or video witnessing is not accepted for LPAs.

What if the witness makes a mistake on the form?

Cross out the error with a single line, write the correction, and have the witness initial the change. Do not use correction fluid.

Can a witness also be a person to notify?

Yes. Being named as a "person to notify" does not prevent someone from acting as a witness.

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