There are two types of LPAs:
A property and financial affairs LPA gives someone the power to make decisions about money and property, such as managing a bank account, paying bills, managing benefits. This can be used while someone has mental capacity, or drafted to come into force only if the donor loses mental capacity in the future.
A health and welfare LPA gives someone the power to make decisions about things like medical care and daily routine but can only be used when someone loses mental capacity.
You can create an LPA online and apply for it to be registered. Or you can download the forms and apply by post.
The OPG (Office of the Public Guardian) will check the LPA before they register it. You must show your LPA document or a certified copy every time you act on their behalf.