Is it possible for there to be granted a non revocable power of attorney?
<p>Suppose A is on in years and grants B power of attorney for them to assist in managing their affairs. Then A comes to distrust B and would rather reassign the power of attorney to C. Can B block, contest or otherwise resist this on any grounds?</p>

<p><a href="/questions/tagged/england-and-wales" class="post-tag" title="show questions tagged &#39;england-and-wales&#39;" rel="tag">england-and-wales</a></p>
<p>A can end their Lasting Power of Attorney (LPA) with B, if they have the mental capacity to make the decision to do so, by sending to the Office of the Public Guardian:</p>
<blockquote>
<ul>
<li><p>the original LPA</p>
</li>
<li><p>a written statement called a &quot; deed of revocation&quot; [<a href="https://www.gov.uk/power-of-attorney/end" rel="nofollow noreferrer"><em>Source</em></a>].</p>
</li>
</ul>
</blockquote>
<p>Once revoked, A is able to appoint C if they so wish.</p>
<p>If A lacks the required capacity and then, as per the <a href="https://www.gov.uk/government/publications/mental-capacity-act-code-of-practice" rel="nofollow noreferrer">Mental Capacity Act Code of Practice</a> an application may be made to Court of Protection:</p>
<blockquote>
<p>7.45 The Court of Protection has a range of powers to:</p>
<ul>
<li><p>determine whether an LPA is valid</p>
</li>
<li><p>give directions about using the LPA, and</p>
</li>
<li><p>to remove an attorney (for example, if the attorney does not act in the best interests of the donor)</p>
</li>
</ul>
<p>...</p>
<p>8.7 The person making the application will vary depending on the circumstances<sup>1</sup>.</p>
</blockquote>
<p>So... the only legal route (that I can find) for B to contest their revocation as LPA would be to argue their case before the Court of Protection for a determination in their favour.</p>
<hr />
<p><sup>1</sup><sub>too numerous to repoduce here - see the MCA Code at page 140 <em>et seq</em></sub></p>

<p>In the US, the laws governing a Power of Attorney (PoA) vary by state. But in general, the principal (grantor) can always revoke a PoA, or grant a new PoA to a different person which supersedes the previous PoA, <strong>provided</strong> that s/he is mentally competent to do so. If A has given a PoA to B, and indicates a desire to cancel it and give a PoA to C instead, <strong>and</strong> B thinks that A is not competent and this decision will not be in B's best interests, then B can petition for A to be declared incompetent, and have a guardian appointed for A.</p>
<p>That requires a court order, based on evidence about A's mental condition. A guardian functions in some ways like the holder of a PoA, being able to act for the principal (here called a &quot;ward&quot;). But a guardian has much more control over the ward, and the ward cannot dismiss a guardian. It takes another court order to do that.</p>
<p>Having a guardian appointed is a very serious step, and courts do not do it lightly.</p>

united-states power-of-attorney