When someone contests a Last Will and Testament, they are objecting to its validity. In order to contest a Will in New Jersey, an individual must have “standing,” or locus standi. To have standing, or locus standi, the individual must be considered a person with an interest in the estate, such as legal heir. Anyone named in a prior Last Will and Testament may also have standing to contest a Will, if the Will entered into probate removes or reduces the share that person or group would have received in a prior Will.