Process Server Definition:
Process Servers are people who deliver court documents for a living, particularly the summons and complaint necessary to start a trial. Service of Process; Civil Procedure. Some specialize in delivering papers to defendants who are deliberately trying to evade service of process. Many jurisdictions license and regulate process servers.
Service of Process
The Due Process clauses in the United States Constitution prohibit courts from exercising personal jurisdiction over a defendant unless the defendant has proper notice of the court's proceedings. To meet this rule, courts require plaintiffs to arrange for defendants to be served with a court summons and a copy of the plaintiff's' complaint. These papers are collectively called process.
Typically, it is not enough to simply mail process to the defendant. The summons and complaint must be either given directly to defendants or left with a suitable person at their home or place of business. Service may usually be performed by any adult who is not a party to the lawsuit. Plaintiffs may hire professional process servers to serve defendants.