In law, obligation entered into before a court or magistrate requiring the performance of an act (e.g., appearance in court), usually under penalty of a money forfeiture. The most common use of recognizance is in connection with bail in criminal cases. The accused may also be released on his “own recognizance” when no bail is required.
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Recognizance is most often encountered regarding bail in criminal cases. By filing a bail bond with the court, the defendants will usually be released from imprisonment pending a trial or appeal. If no bail has been set, the defendants are released "on their own recognizance." Release on recognizance is sometimes called RoR, or, particularly in the United States, OR.