title deed

from WordNet (r) 3.0 (2006)

title deed
    n 1: a legal document proving a person's right to property

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

TITLE DEEDS. Those deeds which are evidences of the title of the owner of an 
estate. 
     2. The person who is entitled to the inheritance has a right to the 
possession of the title deeds. 1 arr. & Marsh. 653.