The term 'person acting on behalf of another' can be summarized as an AGENT. An AGENT is a person who is authorized to act on behalf of another person or organization. Agents are often used in business transactions, such as when a company hires a real estate AGENT to represent them in the purchase or sale of a property. Agents can also be used in legal matters, such as when a lawyer acts as an AGENT for a client in court proceedings. Agents can also be used in other areas, such as when a person is hired to represent another person in negotiations or other activities.