Can a will be challenged if the person lacked capacity?
Common question · Contested Wills & Estates · Australia · 23 October 2026
General information from Lawmateanz
Yes. In Australia, a will can be challenged if the person didn't have testamentary capacity when they made it, meaning they didn't understand what a will is, what they owned, or who might expect to benefit.
A will can also be challenged for undue influence, fraud, or if it wasn't properly signed and witnessed.
Medical records, the lawyer's file notes and witness evidence are often important.
These claims can be complex and costly, so get advice early.
Written by Lawmateanz, not by a lawyer. General information only, not legal advice about your situation. For advice about your own matter, talk to a lawyer.
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