Implikasi Hukum Balik Nama Sertipikat Hasil Jual Beli Yang Prosesnya Dihalangi Ahli Waris dan Tanggung Jawab Notaris dan PPAT Dalam Pembuatan Surat Keterangan Waris Ganda (Studi Putusan Mahkamah Agung Nomor 565 K/Pdt/2020) = The implications of the legal consequences of transferring ownership of a Sale and Purchase Deed certificate, where the process is obstructed by heirs, and the responsibilities of the Notary and Land Deed Official (PPAT) in issuing duplicate Inheritance C