Penerbitan sertipikat pengganti dan perlindungan hukum terhadap pemegang sertipikat pengganti karena hilang guna menciptakan kepastian hukum: Studi pada Kantor Pertanahan Kabupaten Batu Bara Sumatera Utara = Issuance of replacement certificates and legal protection for replacement certificate holders due to loss in order to create legal certainty: Study at the Land Office of Batu Bara Regency, North Sumatra