How do you Invoke a Power of Attorney?

22nd October 2025

Updated: Tuesday 30th December 2025

How do you Invoke a Power of Attorney? People often talk about invoking Power of Attorney, but what does this actually mean in the UK? Understanding when a Power of Attorney can be used is essential to ensure your attorneys act legally, appropriately and in your best interests.

This guide explains when a Lasting Power of Attorney takes effect, how it is used, and why registration matters.

What Does Invoking a Power of Attorney Mean?

Invoking a Power of Attorney means the point at which your attorney can legally start making decisions on your behalf.

In the UK, a Lasting Power of Attorney can only be used after it has been registered with the Office of the Public Guardian. Registration confirms the document is valid and gives your attorneys legal authority to act.

The timing of when it can be used also depends on the type of LPA you have created.

When Can a Property and Financial Affairs LPA Be Used?

This type of LPA is the most flexible.

A Property and Financial Affairs LPA can be used as soon as it is registered with the Office of the Public Guardian, as long as you give consent and still have mental capacity. Many people choose to allow early use so attorneys can help with tasks such as paying bills, managing bank accounts or handling property matters.

If you later lose mental capacity, your attorneys can continue to act without interruption.

When Does a Health and Welfare LPA Take Effect?

Health and welfare decisions are treated differently under UK law.

A Health and Welfare LPA can only be used once you have lost mental capacity to make those decisions yourself. Until that point, you remain fully in control of your medical care, treatment and living arrangements.

This safeguard ensures your independence is respected for as long as possible.

Why Must a Power of Attorney Be Registered First?

Registration is a legal requirement.

Without registration, a Power of Attorney has no legal effect. The Office of the Public Guardian checks that the document has been completed correctly, signed in the right order, and includes the necessary safeguards. Only once registered can attorneys prove their authority to banks, care providers or medical professionals.

A registered LPA includes an official certificate page confirming its validity.

How Do Attorneys Start Using a Registered LPA?

Using a Power of Attorney is a practical process.

Attorneys usually provide certified copies of the registered LPA to organisations such as banks, utility companies, insurers, or healthcare providers. These copies confirm the attorney’s authority and allow them to act without delay.

It is also wise for donors to discuss their wishes and preferences with attorneys in advance, so decisions reflect personal values.

Should a Power of Attorney Be Reviewed Over Time?

Your life circumstances may change.

Yes, it is sensible to review your Power of Attorney regularly. Changes in relationships, finances, health, or personal wishes may mean your LPA no longer reflects your intentions. If you still have capacity, you can replace an existing LPA with a new one at any time.

Keeping your Power of Attorney up to date helps avoid confusion and future disputes.

Invoking Power of Attorney is not about losing control. It is about planning ahead and ensuring support is available when needed. Understanding when each type of LPA can be used helps both donors and attorneys act with confidence and clarity.

Power of Attorney Online guides you through registration, explains when your LPA can be used and helps ensure everything is set up correctly from the start, giving you long term peace of mind.