What must an insurer do to officially appoint an insurance agent?

To officially appoint an insurance agent, an insurer must file a notice of appointment with the superintendent of insurance. This requirement ensures that the state's regulatory authority is informed of the relationship between the insurer and the agent. It helps maintain oversight of agents operating within the state and ensures that they are properly licensed to conduct business.

The involvement of the superintendent of insurance is critical as this office oversees insurance practices, regulates agents, and ensures compliance with state laws. By filing this notice, the insurer formalizes the appointment, allowing the agent to legally represent the insurer in transactions involving insurance policies.

The other options suggest various actions that do not fulfill the legal requirement of appointment. For instance, filing with the state attorney general or notifying current license holders does not pertain to the formal appointment process, and submitting a written application to the agent does not constitute an official action by the insurer.