During discovery, both parties also may issue subpoenas to third-party witnesses if other individuals who are not part of the litigation nevertheless have information that may be necessary to the case. For example, if you are suing someone for harassing you, you may need phone records to show how many times a day the person called you. To get those phone records, you would issue a subpoena to the phone company.
A lawsuit is a proceeding by a party or parties against another in the civil court of law. The archaic term "suit in law" is found in only a small number of laws still in effect today. The term "lawsuit" is used in reference to a civil action brought in a court of law in which a plaintiff, a party who claims to have incurred loss as a result of a defendant's actions, demands a legal or equitable remedy. The defendant is required to respond to the plaintiff's complaint. If the plaintiff is successful, judgment is in the plaintiff's favor, and a variety of court orders may be issued to enforce a right, award damages, or impose a temporary or permanent injunction to prevent an act or compel an act. A declaratory judgment may be issued to prevent future legal disputes.