In common law, a writ is a formal written order issued by a body with administrative or judicial jurisdiction; in modern usage, this body is generally a court. Warrants, prerogative writs, subpoenas,
Summons
…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…
A writ of attachment
A sealed writ of Edward the Confessor, a king of England who died in 1066 – the same year as the Norman Conquest
Return of the Writ shown above, endorsed by the Sheriff of Philadelphia, stating that he is still in possession of the attached property for want of a buyer