Where must any written notice be sent to the insurer?

For a written notice to be effectively communicated to the insurer, it should be directed to the chief agency or head office. This is because the chief agency or head office is typically the designated point of contact for handling formal communications regarding policies, claims, and other important matters. Sending the notice to the head office ensures that it reaches the appropriate department that can process it correctly and handle any necessary actions on behalf of the insurer.

In many cases, local branch offices might not have the authority or full access to the systems or records needed to address certain issues comprehensively. Likewise, sending notices to any insurance agent may lead to delays or miscommunication, as the agent may not be responsible for processing formal notices directly. Directing the notice to the policyholder's address also does not apply, as it is the insurer that needs to be notified, not the policyholder in this context. Therefore, routing the notice to the chief agency or head office is the most appropriate and effective option for ensuring proper handling.