In order for a Will to be valid, the Will Maker must have chosen to sign their Will free of any overt pressure or influence and have possessed the capacity to understand what they were signing.
If you believe a Will is invalid you should take urgent steps to prevent a Grant of Probate from being issued, by lodging a Probate Caveat. A Probate Caveat prevents the proposed executor(s) or administrator(s) from obtaining a grant of representation, and thus being able to administer the estate of the deceased person. A Probate Caveat will last for six months from the date on which it is lodged, unless otherwise directed by the Court. A Probate Caveat is lodged electronically on the Supreme Court filing system, which we can assist you with.
Alternatively, if a Grant of Probate or Letters of Administration have already been granted, you may seek to have the grant revoked. This should occur as soon as possible after the grant, as there exists a statutory time limit of six months from the date Probate or Letters of Administration are granted within which a challenge may be initiated.
You can also refer to our blog post on challenging a will for additional information on contesting a will.