The USA defines an agent as any individual who represents a broker-dealer or an issuer in effecting or attempting to effect transactions in securities for their clients. Agents are individuals in a sales capacity who represent broker-dealers or issuers of securities. As agents, they act, usually on commission basis, on behalf of others. Agents are often referred to as registered representatives, whether sell registered securities or securities exempt from registration. The use of the term individual here is important. Only an individual, or a natural person, can be an agent. A corporation such as a brokerage firm is not a natural person, it is a legal entity. The brokerage firm is the legal person, or legal entity, the agent, a natural person, represents in securities transactions.