Nonperson

A nonperson is a citizen or a member of a group who lacks, loses, or is forcibly denied social or legal status, especially basic human rights, or who effectively ceases to have a record of their existence within a society (damnatio memoriae), from a point of view of traceability, documentation, or existence. The term also refers to people whose death is unverifiable and about which inquiries result in a "blank wall" of "nobody knows".