Which reporting method allows for a formal investigation and involves notifying the chain of command?

The reporting method that allows for a formal investigation and involves notifying the chain of command is Unrestricted Reporting. This option is designed to ensure that when a service member reports an incident, it triggers a comprehensive response that includes a full investigation. In an Unrestricted Reporting scenario, the individual reporting the incident provides their identity and information is shared with command authorities to facilitate a thorough inquiry, ensuring that the issue is addressed seriously and actions can be taken to support the victim and prevent further incidents.

This approach contrasts with Restricted Reporting, which is meant for those who wish to report an incident without initiating an official investigation, thereby maintaining confidentiality. Informal Reporting typically does not involve the chain of command and is often used for discussion without necessarily pursuing formal action. A Formal Complaint, while it may initiate an investigation, is typically the outcome of the reporting process rather than a method of reporting itself.