The Federal Rules of Civil Procedure (FRCP) bring some uniformity to federal civil proceedings. Understanding what constitutes service of process in cases involving federal courts is essential to ensuring lawsuits properly proceed. The rules describe what constitutes proper national service of process. The federal service of process rules are not your only concern when it comes to serving process. Law firms must also adhere to state laws and regulations, which are often more strict, when serving legal documents to a defendant.