Hi my friend and my best friend L and her adoptive parents have been estranged for two years now and at 17, L is engaged to her boy friend. She wants to know if she can sign something or make up a letter to give to her fiance' s mum(B) the legal right to be her advocate and speak on her behalf especially medically. she feels helpless and scared cause she doesn't know fully what her rights are and she wants her fiance's mum to be there and speak for her and do enquiries for her Especially in her health matters and having just had a baby. L has been unwell on and off a lot and sees her fiance's mum like a real mum. please help it is urgent. She can't understand lots of things and wishes Bonnie to speak for her and make enquiries and phone calls for her but she's been told she will need something in writing as my best friend is 17, female and her adoptive parents won't help her on anything. What are the laws (e.g. Australian Law) and how does she go about getting or doing a authority thing please? Does L maybe have to go to a court house to fill out something. none of us know how to help her on this matter?