The Illinois US 285 Form (service of process by United States Marshals Service) is a form used by the U.S. Marshals Service to serve legal documents such as summonses, subpoenas, and other court orders. The form is used to provide proof of service, which is required for court proceedings. The form is divided into two parts: Part 1 is for the process server (U.S. Marshal) to complete and Part 2 is for the person or entity being served (defendant) to complete. There are two types of Illinois US 285 Forms: Service of Process and Service of Subpoena. The Service of Process form is used to serve any type of legal document related to a court proceeding. The Service of Subpoena form is used to serve a subpoena, an order issued by a court requiring an individual or entity to appear in court or produce documents. Both forms require the process server to provide details about the service, including the date, time, and place of service. The defendant must also provide information such as their name, address, and signature.