Can an Attorney Witness an LPA?

Written by James Tyrrell · Reviewed by Anthony Dalton · Last reviewed 9 April 2026

This is one of those LPA rules that trips people up more than it should. An attorney cannot witness the donor's signature, but they can witness another attorney's signature. It sounds simple enough, yet getting it wrong is one of the top reasons the Office of the Public Guardian (OPG) rejects LPA applications — and the mistake cannot be corrected without starting the whole process again.

Attorneys Cannot Witness the Donor's Signature

The most important rule is clear and absolute: an attorney named in the LPA cannot witness the donor's signature. This applies to both original attorneys and replacement attorneys. The restriction exists under the Mental Capacity Act 2005 regulations to prevent any suggestion that the attorney influenced the donor's decision to create the LPA.

The rationale behind this rule is straightforward. The attorney is the person who will gain decision-making power over the donor's affairs. If that same person also acts as the witness confirming the donor signed freely and voluntarily, there is an inherent conflict of interest. The law therefore requires that someone independent — someone who is not named as an attorney — witnesses the donor's signature.

Attorneys Can Witness Another Attorney's Signature

Here is where the rules become more flexible. An attorney named in the LPA can witness the signature of another attorney on the same document. This is explicitly permitted under the regulations and is a common arrangement in practice.

For example, if a donor appoints their two children — Sarah and James — as joint attorneys, Sarah can witness James's signature and James can witness Sarah's. This can be particularly convenient when the attorneys live near each other and can easily meet to sign the document together.

The same rule applies to replacement attorneys. A replacement attorney can witness an original attorney's signature, and an original attorney can witness a replacement attorney's signature. The only restriction is on witnessing the donor's signature.

What About the Certificate Provider's Signature?

The certificate provider's section of the LPA does not require a separate witness. The certificate provider simply signs their own section to confirm that, in their opinion, the donor understands the LPA and is not acting under undue pressure. Therefore, the question of whether an attorney can witness the certificate provider's signature does not arise in practice.

For more on what the certificate provider does and who can fulfil this role, see our guide on what a certificate provider is.

Practical Tips for Attorney Witnessing

Knowing the rules is one thing, but applying them in practice can sometimes be confusing. Here are some practical tips to help you get the witnessing right:

• Plan the signing in advance: Before you begin, make a list of who will witness each signature. Ensure the donor's witness is not an attorney
• Use attorneys as witnesses for each other: If you have multiple attorneys, they can conveniently witness each other's signatures. This saves finding additional witnesses
• Consider having one independent witness for everything: To keep things simple, you could ask a single independent person (such as a neighbour or colleague) to witness all signatures — the donor's and each attorney's
• Double-check before signing: Before anyone picks up a pen, confirm that the witness for the donor's signature is not named anywhere in the LPA as an attorney
• Remember the signing order: The donor must sign first, then the certificate provider, then the attorneys. An attorney cannot sign before the donor, regardless of witnessing arrangements

Common Mistakes to Avoid

The most common mistake is an attorney witnessing the donor's signature. This often happens when families are sitting together to complete the LPA and do not fully understand the distinction between the different signature sections. Other mistakes include:

• A replacement attorney witnessing the donor's signature: Replacement attorneys are subject to the same restriction as original attorneys. They cannot witness the donor's signature
• Confusing witnessing with being present: An attorney can be in the room when the donor signs — they just cannot be the named witness on the form
• Assuming all witnessing rules are the same: The rules for the donor's signature are stricter than for attorneys' signatures. Do not apply the donor's restrictions across the board

Summary of Attorney Witnessing Rules

To make the rules as clear as possible, here is a simple summary:

Who Can Be a Witness for an LPA?

Beyond the attorney-specific rules above, it helps to understand the general requirements for any LPA witness. To act as a witness, a person must:

• Be aged 18 or over
• Be physically present when the person signs the document
• Not be the person whose signature they are witnessing — you cannot witness your own signature

It is also worth knowing that the certificate provider can witness the donor's signature. Since the certificate provider is already required to be present when the donor signs, this can be a practical arrangement. For a broader look at who qualifies, see our guide on who can witness an LPA signature.

For a full explanation of all the witnessing rules, read our guides on who can witness an LPA signature and who cannot witness an LPA. If you need help with the correct sequence of signatures, see our guide on the LPA signing order.

Frequently Asked Questions

This guide was last reviewed and updated on 9 April 2026. Information is based on current legislation and OPG guidance for England and Wales.

Back to Guides