In the context of EB-5, a Writ of Mandamus is a federal lawsuit that forces USCIS to take action on a case that has been unreasonably delayed. Filing a Writ of Mandamus forces adjudication, which does not necessarily mean approval, and so this action should not be taken lightly. Mandamus is, however, an option, particularly in cases that have been pending beyond the normal adjudication time without any clear reason from USCIS. Anyone considering a Writ of Mandamus should consult an immigration attorney with experience filing such actions.