The requirement that plaintiffs have a serious interest in a case, depending on whether they have sustained or are likely to sustain a direct and substantial injury from another party or from an action of government, is called

Standing to sue

Explanation:

The requirement that plaintiffs have a serious interest in a case, depending on whether they have sustained or are likely to sustain a direct and substantial injury from another party or from an action of government, is called standing to sue

This simply means legal standing to sue is about who can rightfully bring an in court, not about the issues or facts of the actual case. The standing law allows enforcement of this requirement by requiring that the party filing sue suffer an injury caused by the other party that can actually be addressed by the court.In