Rule 4 of the Federal Rules of Civil Procedure covers how service can be accomplished on a defendant either through “personal service” of a complaint and summons or mail service through a procedure called “waiver of service of summons”.
Rule 4 - Process: Summons (A) Summons: issuance. Upon the filing of the complaint the clerk shall forthwith issue a summons for service upon each defendant listed in the caption. Upon request of the plaintiff separate or additional summons shall issue at any time against any defendant.
Service of process is giving the other parties in the court case the documents that were filed in the case so that they have notice that a lawsuit was filed against them and they have the opportunity to respond.
(i) Mail by ordinary mail and by certified mail, return receipt requested, a copy of the summons, complaint, document, or other process to be served to the persons and addresses provided by the plaintiff, if any.
(c) If service of process is refused or was unclaimed, the Clerk shall forthwith electronically file a Return of Service Unexecuted which shall serve as notice to the attorney of record or if there is no attorney of record, the party at whose instance process was issued (who shall be copied by regular mail), that ...
Take the Complaint with you to the Clerk's office and show it to the Clerk to confirm that you are in the right office. Then give the Clerk both your original Answer and your photocopy. Ask the Clerk to file-stamp the original and the copy and to give you your copy back.
Except for motions made during a hearing or during trial, motions are required to be in writing. They must also be filed in court and served on the opposing party's attorney (or the party if not represented by counsel). If the motion is contested, the opposing attorneys will also file papers opposing the motion.