Summons

Legally, a summons (also known in England and Wales as a claim form and in the Australian state of New South Wales as a Court Attendance Notice (CAN)) is a legal document issued by a court (a judicial summons) or by an administrative agency of government (an administrative summons) for various purposes.

A judicial summons is served on a person involved in a legal proceeding. Legal action may be in progress against the person, or the person's presence as witness may be required. In the former case, the summons will typically announce to the person to whom it is directed that a legal proceeding has been started against that person, and that a case has been initiated in the issuing court. In some jurisdictions, it may be drafted in legal English difficult for the layman to understand, while several U.S. states expressly require summonses to be drafted in plain English and that they must start with this phrase: "Notice! You have been sued."

The summons announces a date by which the person or persons summoned must either appear in court, or respond in writing to the court or the opposing party or parties. The summons is the descendant of the writ of the common law. It replaces the former procedure in common-law countries by which the plaintiff actually had to ask the sheriff to arrest the defendant in order for the court to obtain personal jurisdiction in both criminal and civil actions.

A citation, traffic violation ticket, or notice to appear is a type of summons prepared and served at the scene of the occurrence by a law enforcement official, compelling the appearance of a defendant before the local magistrate within a certain period of time to answer for a minor traffic infraction, misdemeanor, or other summary offence. Failure to appear within the allotted period of time is a separate crime of failure to appear.

In Australia, minor traffic and some summary offences are known as an Infringement Notice or a Fine and can be dealt with by paying a particular monetary amount depending on the offence. The accused person has the right to have the matter heard in a Court; if found not guilty the accused person pays nothing other than his legal costs (if any); if found guilty the accused person faces the prospect of a conviction for the offence and/or a substantial increase in the fine up to the maximum. For example, proceeding through a red light could go from A$353 up to A$2,200 if convicted in NSW. For more serious offences, a Field Court Attendance Notice is issued.

...
Wikipedia