I think the term you are looking for is "Vexatious litigant" [0]. People who are declared as such by a court must apply for permission (which is rarely given) b

I think the term you are looking for is "Vexatious litigant" [0]. People who are declared as such by a court must apply for permission (which is rarely given) before launching any court cases. [0] https://en.wikipedia.org/wiki/Vexatious_litigation https://en.wikipedia.org/wiki/Vexatious_litigation