To do something “by proxy” means a person you have formally authorized is acting in your place, and their decision or vote counts as if you had made it yourself. The word comes from the Middle English “procuracy,” rooted in the Latin “procuratio,” and today it describes any arrangement where you hand another person the legal power to decide or vote on your behalf. You see it in corporate shareholder meetings, in hospital rooms when a patient cannot speak for themselves, and in financial planning. The specific rules shift depending on which kind of proxy is involved, but the underlying structure is the same.
The Legal Structure Behind Any Proxy
Every proxy sits on top of agency law. You are the principal. The person you choose is the agent. Within the boundaries you set, that agent’s decisions bind you the same way your own would. A written proxy document typically spells out exactly what the agent can and cannot do, and the authority can be limited to a single task or a narrow window of time.
Taking on proxy authority is not casual. The agent owes you fiduciary duties, and two of them do most of the work. The duty of loyalty means they must act in your interest, not use the role to benefit themselves at your expense. The duty of care means they must make informed, reasonable decisions rather than acting carelessly or ignoring what they should know.1Securities and Exchange Commission. Commission Guidance Regarding Proxy Voting Responsibilities of Investment Advisers An agent who steps outside the authority you granted risks having the transaction voided and can be personally liable for breach of fiduciary duty.
Where the Term Shows Up
Corporate Shareholder Voting
The most familiar use of the word is corporate voting. When a company holds its annual meeting, most investors cannot attend in person, so the company sends out a proxy statement describing every matter up for a vote. The Securities and Exchange Commission regulates these statements under Regulation 14A, which requires shareholders to receive the document before anyone solicits their vote.2eCFR. Regulation 14A Solicitation of Proxies By signing and returning the proxy card, you appoint a representative to cast your votes at the meeting according to your instructions. Without this mechanism, most companies would struggle to assemble enough participating shareholders to legally finalize decisions.
Healthcare Decisions
A healthcare proxy is a document in which you name someone to make medical decisions for you if you lose the capacity to decide for yourself. Your agent gains authority to consent to or refuse treatments, approve surgeries, and make end-of-life care decisions based on your stated preferences.3VA.gov. Evaluation of the Capacity to Appoint a Healthcare Proxy
The document stays dormant until it is triggered. Activation typically requires a clinical judgment that you have lost the capacity to make your own medical decisions.3VA.gov. Evaluation of the Capacity to Appoint a Healthcare Proxy Once your treating physician documents that determination, your agent can act. If you later regain capacity, the proxy goes back to sleep and you resume making your own decisions.
Proxy and Power of Attorney Are Not the Same Thing
People often use “proxy” and “power of attorney” interchangeably, but they do different jobs. A healthcare proxy is narrow: medical decisions, and only when you are incapacitated. A power of attorney can cover a much wider range of financial and legal matters, and depending on the type, it may be effective immediately upon signing.
A durable power of attorney for finances typically authorizes your agent to handle bank accounts, real estate transactions, tax filings, investments, and business operations, and it remains effective even if you later become incapacitated. A springing power of attorney is signed now but only becomes effective when a specified trigger occurs, such as a physician certifying in writing that you are incapacitated. Many estate plans include a corporate proxy where relevant, a healthcare proxy, and a durable financial power of attorney because each fills a different gap.
What a Proxy Agent Cannot Do
Proxy authority has hard limits. As a fiduciary, an agent cannot profit from a conflict between their personal interests and yours. They cannot use confidential information they gain through the relationship for their own benefit, and that restriction survives even after the relationship ends.1Securities and Exchange Commission. Commission Guidance Regarding Proxy Voting Responsibilities of Investment Advisers
Certain actions are off the table for any agent, no matter how the document is written. No proxy can change your will or create a new one for you, because a will requires your personal intent and signature. An agent generally cannot vote for you in a public political election; rules vary by state, but most do not permit proxy voting in political elections the way corporations do. Under many state laws, an agent also cannot make gifts from your assets, change beneficiary designations, or waive survivorship rights unless you specifically granted that authority in the original document.
Ending or Revoking a Proxy
A proxy is not permanent, and knowing how to pull it back is part of understanding what one is.
For a corporate proxy, you can revoke it any time before the vote by submitting a new proxy card with a later date (which automatically cancels the earlier one), by sending a written revocation to the corporate secretary, or by attending the meeting and voting in person. Showing up at the meeting does not cancel your proxy on its own; you have to affirmatively request that. Many state corporate codes also set a default expiration, commonly around three years from the date the proxy was signed, unless the document specifies otherwise.
For a healthcare proxy, you can revoke it as long as you have the mental capacity to do so. Most states allow revocation by written notice, by executing a new healthcare proxy that replaces the old one, or by telling your healthcare provider you revoke it. Some states also allow revocation by court order. If you regain capacity after a period of incapacitation, your physician may encourage you to review the document and update it if your preferences have changed.