A registered agent is responsible for receiving important legal and tax documents on behalf of the company. These include pleadings in connection with lawsuits, annual report and tax information. Registered agents must have a physical address in the State of formation or qualification of the business. Post office boxes will not be sufficient. The registered agent’s address is a matter of public record and easily accessible via the internet. For this reason, many people choose to have a company like A and A Companies, Inc., to act as their registered agent.