Writs of Habeas Corpus. An application for a Writ of Habeas Corpus is filed when a person seeks relief from unlawful detention or imprisonment.What Is Habeas Corpus? The state writ of habeas corpus is a legal mechanism that allows individuals to challenge their detention or imprisonment. The writ of habeas corpus is the remedy to be used when any person is restrained in his liberty. A Writ of Habeas Corpus (Latin for "that you have the body") may be filed on behalf of a person who is unlawfully imprisoned. The writ of habeas corpus is a written formal request used to decide if a specific imprisonment has validity. A writ of habeas corpus stands as a vital legal tool, essential for safeguarding individual rights and averting arbitrary detention. A writ of habeas corpus is a legal tool that a person can use to enforce a superior right of possession to a child. A state writ of habeas corpus is a legal document that allows people in state custody to challenge the legality or constitutionality of their detention.