Perlindungan Hukum Kreditur Yang Sertifikat Jaminan Fidusia Tidak Sah Terhadap Debitur Yang Wanprestasi Berdasarkan Putusan Mahkamah Agung Nomor 3584 K/PDT/2018 = Legal Protection of Creditors With Unauthorized Fiduciary Guarantee Certificate Against Default Debtors Based on Supreme Court Decision Number 3584 K/PDT/2018