Common Mistakes LPA Application UK

The OPG Rejects About 15% of DIY Applications

That number comes from the Office of the Public Guardian's own caseworker data, and the majority of those rejections stem from errors that are entirely preventable. A rejected LPA means you lose weeks — the processing clock resets, you may need to pay another £92 registration fee, and if the donor's cognitive condition is progressing, that delay can close the window for making a valid LPA altogether.

Here are the mistakes that actually trip people up.

Getting the Signing Order Wrong

This is the single most common cause of OPG rejections. The Mental Capacity Act 2005 mandates a strict chronological sequence:

1. The donor signs Section 9 first
2. The certificate provider signs Section 10 on the same day or after
3. Each attorney and replacement attorney signs Section 11 after the certificate provider has completed Section 10

If an attorney signs before the certificate provider dates their section, the entire LPA is invalid. Not "needs a correction" — invalid. You have to start the whole application from scratch.

The dates on each section are what the OPG checks. Even if everyone was physically present on the same day, a backdated or incorrectly ordered date will trigger a rejection.

Using an Ineligible Certificate Provider

The certificate provider confirms that the donor understands the LPA and is not being pressured into signing. They must be either a professional (solicitor, GP, registered healthcare professional) or someone who has known the donor personally for at least two years.

People who cannot act as certificate provider:

• Any named attorney or replacement attorney
• A family member of the donor
• A family member of any attorney
• An employee of a care home where the donor lives
• A business partner of the donor or any attorney
• Anyone under 18

Choosing someone who falls into these categories means an automatic rejection and a fresh application.

Witness Eligibility Errors

Every signature on an LPA needs a witness, but the rules about who can witness whom catch people out:

• Attorneys cannot witness the donor's signature — this is the most common witness error
• The donor cannot witness an attorney's signature
• An attorney cannot witness another attorney's signature
• Any independent adult over 18 can serve as a witness, but they must be physically present when the person signs

One witness can technically witness multiple signatures in the same LPA, as long as they are not disqualified by the relationships above.

Correction Fluid and Crossed-Out Entries

The OPG does not accept LPA forms with correction fluid (Tipp-Ex), heavy crossings-out, or unclear amendments. If you make an error on a paper form, the safest approach is to print and complete a fresh section.

For minor corrections — a wrong date, a misspelled name — you can draw a single line through the error, write the correction above it, and have both the person who made the entry and their witness initial the change. But caseworkers have wide discretion here, and anything that looks unclear or suspicious will delay the application.

Missing the Fee Support Deadline

Since February 2026, the OPG no longer accepts retrospective fee remission applications. If you qualify for reduced fees — Universal Credit claimants now need to prove gross annual income under £12,000 for a 50% remission — Form LPA120 must be submitted at the exact time of the LPA registration application, along with 12 months of consecutive Universal Credit statements.

Miss that window, and you pay the full £92 per document regardless of your financial situation.

How to Protect Against These Errors

The simplest safeguard is a signing-day checklist that enforces the correct order and verifies every participant's eligibility before anyone picks up a pen. Our England Advance Directive guide includes a step-by-step LPA signing tracker that walks through the exact sequence, witness rules, and certificate provider eligibility — designed specifically to prevent the errors that account for most OPG rejections.

If you are managing this process for a parent whose capacity may be declining, the stakes of a rejected application are not just administrative. An invalid LPA during a narrowing capacity window can force the family into a Court of Protection deputyship — a process that costs several thousand pounds and can take close to a year.

Getting it right the first time is not perfectionism. It is the difference between a valid £92 document and a £2,000+ court process.

See more England guides →