You should use this form if. To obtain a writ of habeas corpus, you must show the court that you are in custody in violation of the Constitution or laws of the United States.Affidavit - Written statement made under oath. This Chapter explains an important right—the writ of habeas corpus. The writ of habeas corpus primarily acts as a writ of inquiry, issued to test the reasons or grounds for restraint and detention. Federal habeas corpus is a procedure under which a federal court may review the legality of an individual's incarceration. An attorney of clients jailed for violating their oath before the High Commission, Fuller petitioned the King's Bench for the writ. It must be taken to be true, until twelve men, upon their oaths, have said that it is false. "The member must sign the Enlistment Contract in the presence of the officer administering the oath of allegiance. An attorney of clients jailed for violating their oath before the High Commission, Fuller petitioned the King's Bench for the writ.