What is the term for a person authorized to act for another, often functioning as an agent?

The term "Proxy" is used to describe a person who is authorized to act on behalf of another individual, particularly in a legal or formal context. This concept is commonly applied in scenarios like voting, where a proxy is appointed to cast a vote for someone who is unable to attend. The proxy acts as an agent for the individual, performing tasks and making decisions as authorized.

In various contexts, such as business or legal arrangements, the role of a proxy is crucial as it allows for delegation of responsibilities and participation in processes that require representation. The term carries specific legal implications, making it distinct from other terms like "Representative," which may not necessarily imply an authorization for formal actions in the same way.

While "Representative," "Substitute," and "Assist" describe types of involvement or support, they lack the formal and authorized connotation that is inherent in the term "Proxy." Thus, "Proxy" is the most accurate choice in this context.