Instead of filing an answer within the time specified in the summons, the defendant can choose to dispute the validity of the complaint by filing a demurrer (in the handful of jurisdictions where that is still allowed) or one or more "pre-answer motions," such as a motion to dismiss. It is important that the motion be filed within the time period specified in the summons for an answer. If all of the above motions are denied by the trial court, and the defendant loses on all appeals from such denials (if that option is available), and finally the defendant must file an answer.
However, it is often more convenient to refer to cases – particularly landmark and other notable cases – by a title of the form Claimant v Defendant (e.g. Arkell v Pressdram). Where a legal proceeding does not have formally designated adverse parties, a form such as In re, Re or In the matter of is used (e.g. In re Gault).[1] The "v" separating the parties is an abbreviation of the Latin versus, but, when spoken in Commonwealth countries, it is normally rendered as "and" or "against" (as in, for example, Charles Dickens' Jarndyce and Jarndyce). Where it is considered necessary to protect the anonymity of a natural person, some cases may have one or both parties replaced by a standard pseudonym (Jane Roe in Roe v. Wade) or by an initial (D v D). In titles such as R v Adams, however, the initial "R" is usually an abbreviation for the Latin Rex or Regina, i.e. for the Crown. (For an explanation of other terms that may appear in case titles, see the Glossary of legal terms.)

A lawsuit is a proceeding by a party or parties against another in the civil court of law.[1] 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.