Source : WordNet®

unregistered
     adj 1: (of animals) not recorded with or certified by an official
            breed association; "unregistered dairy cattle" [ant: {registered}]
     2: not registered; "an unregistered citizen" [ant: {registered}]
     3: not filed or recorded in the place prescribed by law; "an
        unregistered trademark"; "an unregistered mortgage" [syn:
        {unfiled}]
     4: (a boat or vessel) not furnished with official documents