What is the primary responsibility of the plaintiff in a legal case?

The primary responsibility of the plaintiff in a legal case is to prove its case in court. This means that the plaintiff must present sufficient evidence and legal arguments to establish the validity of their claims against the defendant. In civil cases, the burden of proof lies with the plaintiff, who must demonstrate that their assertions are more likely true than not, often referred to as the "preponderance of evidence."

This obligation is fundamental to the litigation process, as it underpins the adversarial system in which both parties present their cases, and the decision rests on the evidence and legal standards applied by the court. The plaintiff's success relies heavily on their ability to substantiate their legal claims with credible testimony, documents, and other forms of evidence that align with the relevant laws.

While the plaintiff may also file motions and provide witness testimony, these are part of the broader responsibility to prove their case and not the primary focus. Furthermore, representing the defendant is clearly outside the responsibilities of the plaintiff, as each party is responsible for their own case in court.