In this case, several children petitioned the probate court to appoint a guardian for their mother due to alleged mental disability and undue influence over their mother by some of their siblings. The appellate court held¹ that susceptibility to undue influence, without more independent evidence of mental incompetence, besides susceptibility, does not satisfy the legal requirement that lack of capacity for the appointment of a guardian must be proved by clear and convincing evidence.¹ 250 Ga. App. 856, 553 S.E.2d 278 (2001)