A writ of prohibition is a writ directing a subordinate to stop doing something the law prohibits. In practice, the Court directs the Clerk to issue the Writ, and directs the Sheriff to serve it on the subordinate, and the Clerk prepares the Writ and gives it to the Sheriff, who serves it. This writ is often issued by a superior court to the lower court asking it not to proceed with a case which does not fall under its jurisdiction.
These Writs are issued as "alternative" or "peremptory". An alternative Writ directs the recipient to immediately act, or desist, and "Show Cause" why the directive should not be made permanent. A peremptory Writ directs the recipient to immediately act, or desist, and "return" the Writ, with certification of its compliance, within a certain time.
When an agency of an official body is the target of the Writ of Prohibition, the Writ is directed to the official body over which the court has direct jurisdiction, ordering the official body to cause the agency to desist.
Although the rest of this article speaks to judicial processes, a writ of prohibition may be directed by any court of record (i.e., higher than a misdemeanor court) toward any official body, whether a court or a county, city or town government, that is within the court's jurisdiction.
A "writ of prohibition", in the United States, is an official legal document drafted and issued by a supreme court, superior court or an appeals court to a judge presiding over a suit in an inferior court. The writ of prohibition mandates the inferior court to cease any action over the case because it may not fall within that inferior court's jurisdiction. The document is also issued at times when it is deemed that an inferior court is acting outside the normal rules and procedures in the examination of a case. In another instance, the document is issued at times when an inferior court is deemed headed towards defeating a legal right.
In criminal proceedings, a defendant who has been committed for trial may petition to the superior court for a writ of prohibition, in this case on the ground that his conduct, even if proven, does not constitute the offense charged.