Form 7 Declaration of Inmate Filing is a document issued by the United States Department of Justice that is used to certify that an inmate has filed a petition for habeas corpus relief in a federal court. The form is also used to certify that an inmate has exhausted all available state remedies and that his or her petition is timely. This form is typically used when an inmate has filed a habeas corpus petition in a federal court but has not been able to obtain relief from the state court. The form is also used to certify that all the necessary documents related to the case have been filed. There are two types of Form 7 Declaration of Inmate Filing: Form 7A Declaration of Inmate Filing for Habeas Corpus and Form 7B Declaration of Inmate Filing for Other Relief. Form 7A is used to certify that an inmate has filed a habeas corpus petition in a federal court, while Form 7B is used to certify that an inmate has filed a petition for other relief in a federal court.