Final answer:
When a member is mistakenly declared a deserter, the member's commanding officer, military police, and the personnel records department must be notified immediately to correct the error.
Step-by-step explanation:
When a member is mistakenly declared a deserter, certain procedures and protocol must be observed to correct the error. The primary entities that must be notified immediately include the member's commanding officer, the military police or equivalent entity in charge of absentees and deserters, and the administrative department responsible for personnel records. This ensures that the mistake is rectified in the official records and that any potential penalties or consequences are halted. The immediate notification can help prevent damage to the member's reputation or career and initiate the process of restoring the individual to their proper status.