Definitions for "Unregistered"
To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;
(of animals) not recorded with or certified by an official breed association; "unregistered dairy cattle"
not filed or recorded in the place prescribed by law; "an unregistered trademark"; "an unregistered mortgage"
(a boat or vessel) not furnished with official documents
Most properties are registered and if the one being purchased is not, then it will be at the time of the next transaction. Once registered the property is given a unique reference called the "title number".
not registered; "an unregistered citizen"
Securities issued without specific ownership indicated.