A summon is a legal document that is issued by a Court on a person involved in a legal proceeding. When a legal action is taken against a person or when any person is required to appear in the court as a witness in a proceeding, to call upon such person and ensure his presence on the given date of the proceeding, summons are served.
Warrant
A written order issued by a judicial officer or other authorized person commanding a law enforce ment officer to perform some act incident to the administration of justice.