Pembatalan sertipikat berdasarkan putusan pengadilan yang berkekuatan hukum tetap yang tidak dilaksanakan karena perdamaian (Analisis putusan Mahkamah Agung Republik Indonesia No. 89 PK/TUN/2008) = Certificate cancellation based on fully legal power court decision which is not implemented because of mediation (Analysis of supreme court's decision of Republic of Indonesia No. 89 PK/TUN/2008)