Tanggung Jawab Notaris/Pejabat Pembuat Akta Tanah terhadap Pembatalan Akta Jual Beli yang Surat Kuasanya Palsu dan Tanpa Persetujuan Pemilik Tanah (Studi Kasus Putusan Pengadilan Tinggi Yogyakarta Nomor 106/Pdt/2017/PT. YYK) = Notary/Land Deed Official Responsibility for The Cancellation of The Sale and Purchase Deed which Power of Attorney was Forged and without The Approval of The Land Owner (Case Study of Yogyakarta High Court Decision Number 106/Pdt/2017/PT.YYK).