A Registered Agent is a person or company designated to receive official notifications, including notice of lawsuits and state taxes due on behalf of a business entity, such as a Corporation or a Limited Liability Company (LLC). The registered agent is registered with the state in which the Corporation or LLC is established. The articles of Incorporation (for a Corporation) or the articles of Organization (for an LLC) must designate the registered agent, along with a physical address in the state of formation.