No they don’t announce it de riguer. It is a privacy issue and right.
They tell the person who filed the MP
Report that they contacted the MP and that the person is Voluntarily Missing, or let’s say VM.
Then the database is changed to reflect that and the status of that reported MP case is moved and noted in the VM row. It’s a statistical record.
…Being a “voluntary” missing person is not a crime. Any adult person can simply walk away, and choose to ignore family, friends, associates and employers. Since this type of behavior is not “criminal”, law enforcement is limited on how they conduct these types of investigations. When facts and circumstances indicate a strong possibility of “foul-play”, or the disappearance is the result of a criminal act, the investigation will continue along such a course….