The deceased had dementia when they made their will. How do I challenge it?”

Challenging a will on grounds of validity will commonly involve an inquiry into the deceased’s mental health and capacity at the material time that they gave instructions for the preparation of their will. If the testator was labouring with an illness of the mind (such as dementia) when they made their will, and that illness affected their comprehension and understanding of what they were doing, the extent of their wealth, or who their family members are, then a claim may be brought to challenge the validity of their will.