Keabsahan akta perjanjian pengikatan jual beli yang didasari oleh surat kuasa menjual yang tidak dilegalisasi oleh Notaris (Studi Putusan Mahkamah Agung Nomor 1201 K/PDT/2016) = Validity of deed of agreement based on sale and purchase by power of attorney to sell that is not legalized by A Notary (Case Study of The Supreme Courts Decision Number 1201 K/PDT/2016).

Notaris yang membuat perjanjian pengikatan jual beli dan kuasa menjual dengan objek yang sama kepada beberapa pihak (Studi Putusan Mahkamah Agung nomor 1128K/PID/2017 dan Putusan Majelis Pengawas Pusat Notaris Nomor 13/B/MPPN/VII/2019) = Notary that conducting purchase binding agreement and deed of authorization to sell on the same object for several parties (Study of supreme court's ruling No. 1128K/PID/2017 and national supervisory board of notary's ruling No. 13/B/MPPN/VII/2019).

Tanggung jawab notaris selaku pejabat pembuat akta tanah yang tidak cermat, berpihak, dan tidak menjaga kepentingan para pihak dalam membuat akta jual beli tanah (studi putusan majelis pengawas pusat notaris nomor: 04/B/Mj. MPPN/VIII/2016) = The responsibility of notary as a PPAT who is unmeticulous biased and unable to safeguard the interest of parties in making land sale and purchase deed study (supervisory council of notaries verdict number 04/B/Mj. MPPN/VIII/2016)

Akibat hukum keberpihakan notaris/ppat dalam pembuatan akta jual beli atas tanah (studi putusan makamah agung nomor 1175 k/pid/2016) = Legal concequences of notary/ppat allegiance in making the deed of sale and purchase of land (study of the verdict of sepreme court of the republic of Indonesia number 1175 k/pid/2016)

Akibat Hukum terhadap Jual Beli Tanah Dibawah Tangan Dan Dijual Kembali serta Dijadikan Agunan kepada Bank (Analisis Putusan Mahkamah Agung Nomor 164/K/Pdt/2018 Juncto Putusan Pengadilan Tinggi Medan Nomor 36/Pdt/2017/PT.MDN Juncto Putusan Pengadilan Negri Tebing Tinggi Nomor 34/Pdt.G/2015/PN.TBT) = Legal Consequences for The Sale and Purchase of Land in A Private Deed and The Land are Resold and Used as Collateral to The Bank (Supreme Court Decision with The Number of 164/K/Pdt /2018 Juncto The High Court in Medan Decision with The Number 36/Pdt/2017/PT.MDN Juncto The Tebing Tinggi State Court Decision Number 34/Pdt.G/2015/PN.TBT)