PROBATE CAVEATS (NSW)
If you think the will of a loved one being probated is invalid or there is another will that supersedes the will being probated, then you should consider placing a caveat over the application for a grant.
You could protect your interest in the deceased’s estate, by lodging a caveat to stay the proceedings seeking Probate or Letters of Administration or resealing, until such disputes are resolved.
Grounds for lodging a Probate Caveat
A Probate Caveat could be lodged if you intend to challenge the validity of a will, where there are concerns of the will being forged, the will-maker not having testamentary capacity to make the will or the will being executed under duress. [...]