Who can contest a will?
In some cases, the deceased may have left property under their will which they promised to you during their lifetime. If so, you may be able to dispute this.
If you consider that you have not been provided for sufficiently when someone has died, whether they had a will or not, you may be eligible to make an Inheritance Act claim.
In some cases there may also be a claim against the professional who drafted the will, if it was intended that you benefit under the will, but you do not.