The Illinois Amended Petition for Writ of Habeas Corpus -- Persons In Federal Custody is a form used to challenge the legality of an individual’s incarceration in federal custody. It is a legal document used to petition the court for a writ of habeas corpus, which orders the custodian (federal prison, jail, etc.) to present the incarcerated individual before a court. This petition is available in two types: a standard petition and an amended petition. The standard petition is used when an individual has exhausted all other legal remedies and seeks habeas corpus relief. The amended petition is used when an individual has already filed a standard petition and wishes to add additional grounds for relief. Both types of petitions must include the petitioner’s name and address, the name of the custodian (federal prison, jail, etc.), the individual’s date of incarceration, and the grounds for relief.