Illinois Affidavit For Service 705ILCS 405-2-16 is a legal document used to initiate service of process in the state of Illinois. It is signed by the person serving the papers and is used to prove that the papers were delivered to the recipient. The affidavit must be completed and filed with the court, along with the documents to be served. There are two types of Illinois Affidavit For Service 705ILCS 405-2-16: an Original Affidavit for Service and a Certified Copy Affidavit for Service. The Original Affidavit for Service is used when the documents are actually handed over to the recipient in person, while the Certified Copy Affidavit for Service is used when the documents are sent by mail or other means. Both affidavits must include the name and address of the recipient, the date of service, the method of service, and the name and address of the person who served the documents.