Keabsahan jual beli hak atas tanah yang terikat jaminan tanpa sertifikat asli (Studi kasus Putusan Nomor 29/PDT.G/2017/PN Tgl) = Legality of land rights transaction that banded with collateral without original certificate (Case study Decision Number 29/PDT.G/2017/PN Tgl).