This form is filed with the Court after the service is done. This form is called an Affidavit of Service.An affidavit of service, also sometimes called a proof of service affidavit, is a type of affidavit that relates to legal documents that are filed with a court. Service is "the formal delivery of a writ, summons, or other legal process or notice" according to Black's Law Dictionary. A formal record in which a judge or court clerk briefly notes all the proceedings and filings in a court case. File. The purpose of this site is to provide information from and about the Judicial Branch of the US Government. This is sometimes called "service of citation" or "service of process. " It is legal notice to the other side that you have filed your case.