LPA Witness Requirements: Who Can Witness Your Signature?

Who can witness an LPA signature

Witnessing sounds like the trivial part of an LPA. It is also one of the most common reasons applications get rejected, because the rules about who may witness which signature are stricter than people expect. Here they are, in full.

The basic rules

Every witness must be 18 or over, have mental capacity, be physically present watching the person sign, and add their full name, address and signature to the form. "Present" means in the room with eyes on the pen. A witness who signs later, on being told the signature happened, has not witnessed anything, and if that ever comes to light the document is compromised.

Who can witness what

The restrictions attach to each signature separately:

• The donor's signature: anyone except a person named as an attorney or replacement attorney on the LPA. A friend, a neighbour, a colleague, even a family member can witness, though an independent witness leaves less room for questions later. The certificate provider is allowed to double as the donor's witness, which is often the tidiest arrangement.
• Each attorney's signature: anyone except the donor. Attorneys should not witness each other's signatures on the same LPA.
• The certificate provider's own section: this one does not need a witness at all. Their signature stands alone.

The safest single habit: check each signature's witness against that signature's rules, rather than assuming one person can witness everything.

The mistakes that actually happen

An attorney witnesses the donor's signature. The most natural mistake in the world (the attorney is usually in the room), and it invalidates the application.

"I'll witness it later." A form posted around the family for signatures, witnessed after the fact. The dates often give it away, and it defeats the entire purpose of witnessing.

Missing details. A signature with no printed name or address. The OPG wants all three, legibly.

One witness rubber-stamps everything without checking the rules per signature. Fine if that person is genuinely eligible for every signature; a rejection if they are named on the form as an attorney.

Practical advice

Line up your witnesses before signing day, brief them on what the role involves (thirty seconds of watching and a minute of writing), and do the signing in as few sittings as possible — it keeps the strict signing order intact: donor first, certificate provider second, attorneys last, with dates to match.

If you make your LPA with us, your check call covers exactly this: who you are planning to use as witnesses, whether each one is allowed, and the order everyone signs in. It is free, and it exists because this page describes the single most avoidable category of rejection.