http://www.13wentworthselbornechambers.com.au/pdfs/actwills.pdf

This is an interesting paper on avoiding a will challenge.

One strange bit is
" The court may be less forgiving if the applicant is callous and hostile,
brought shame on the family,and was a torment for the testator.The testator may have letters, emails and text messages from the estranged child. The testator should be encouraged to keep copies of the testator’s correspondence to
the estranged child to make clear that the testator attempted to reach out and reconcile."

Most of the time the efforts of a testator to reach out to an estranged and dis-disinherited person are seen as a sign that deep down the testator really wanted to give them something!?

http://www.13wentworthselbornechambers.com.au/pdfs/actwills.pdf