Pembatalan perjanjian oleh hakim akibat adanya penyalahgunaan keadaan/Misbruik Van Omstandigheiden atau Undue Influence : analisis kasus Putusan Mahkamah Agung RI nomor 3641K/PDT/2001 dan Putusan Mahkamah Agung RI nomor 2356K/PDT/2008 = Annulment of the agreement by judge due to presence of misuse of circumstances/Misbruik Van Omstandigheiden or Undue Influence : analysis of Supreme Court Decision on Case no. 3641K/PDT/2001 and Decision of Supreme Court of Indonesia no. 2356K/PDT/2008