A power of attorney is one of the most powerful legal documents you can sign, and one of the least understood. People sign them without reading them. Others assume they need one without knowing what it actually authorizes. Getting this wrong has consequences that tend to show up at the worst possible moment.
The basic idea
A power of attorney is a document by which you, the principal, authorize another person, the agent, to act on your behalf. The scope of that authority is defined by the document. A general durable power of attorney for finances gives your agent broad authority over your financial life: banking, investments, real estate, taxes, contracts. A limited power of attorney might authorize a single transaction, like selling a specific piece of property. The word 'durable' means the authority survives your incapacity, which is usually the whole point of having one.
What the agent can and cannot do
Within the scope the document defines, your agent can do almost anything you could do financially, access bank accounts, pay bills, manage investments, sign contracts, handle taxes, buy or sell real estate. What they cannot do is act in their own interest at your expense, make gifts to themselves beyond what you have explicitly authorized, or act after your death, at which point the power of attorney terminates and your will or trust takes over. Courts take abuse of power of attorney seriously. An agent who misuses it can face civil liability and criminal charges, and they do face them, with some regularity.
Why the drafting matters
Not all powers of attorney work the same way. A document that is too vague may be rejected by banks or title companies. One that grants authority to make gifts to family members may or may not include the agent themselves, depending on how it is written. Colorado revised its power of attorney statute in 2010, and documents drafted before then may not function as their owners expect. If yours predates that, it is worth having someone look at it.
Choosing the right person
The legal question and the practical question are not the same. Legally, your agent can be almost any competent adult. Practically, you are choosing someone who will manage your financial life if you cannot. That person needs to be trustworthy, organized, willing to step in under difficult circumstances, and capable of dealing with banks, healthcare providers, and legal systems when things are hard. It sounds obvious until you actually start running through the list of people you know and realize the list of people you would genuinely trust with all of that is shorter than you thought.
Financial vs. healthcare authority
A financial power of attorney covers financial decisions. Healthcare decisions require a separate document, a medical power of attorney or healthcare proxy. Many people need both. You can name the same person for both roles or different people for each, depending on your relationships and your read on who is best suited to each job.
This is a document you create when you are well, for a time when you may not be. Getting it right now is one of the more practical things you can do for your family.