Tanggung jawab notaris atas hilangnya sertipikat hak milik pada proses balik nama (putusan Majelis Pengawas Pusat Notaris Nomor 11/B/MPPN/XII/2017) = The Responsibility of notary for loss freehold tittle in the transfer of ownership process (decision of Majelis Pengawas Pusat Notaris Number 11/B/MPPN/XII/2017)