A habeas corpus petition is used to argue that a person is being unlawfully held in custody, and should be released. In the field shown, click on Petition for Writ of Habeas Corpus, then click on Next. 22.The case number should appear. Habeas corpus is a collateral attack on a judgment of imprisonment and is not a substitute for appeal. Application And Writ Of Habeas Corpus Ad Prosequendum PDF, 204 KB. These files may not be suitable for users of assistive technology. A writ of habeas corpus requires that a person who is in custody be brought before a judge or court and that they be able to challenge that custody. This new Sixth Edition starts a second century for Black's Law. Dictionary-the standard authority for legal definitions since 1891. Federal habeas corpus is a procedure under which a federal court may review the legality of an individual's incarceration. In the early morning hours of April 12, 1861, rebels opened fire on Fort Sumter, at the entrance to the harbour of Charleston, South Carolina.