A complete history of the land.
Under Oklahoma law (1 O.S. §21.1), an abstract of title is a certified compilation of materials and facts of record in the County Clerk and Court Clerk offices that affect title to a specific tract of land.
It begins with the original patent from the United States and lists every subsequent owner, along with liens and mortgages, court litigation, probate proceedings and tax sales. Its purpose is to help establish marketable title.