14 days of service of the summons and complaint or receipt of a notice and
acknowledgement of service. Failure to file a proof of service timely may
result in the imposition of sanctions against the plaintiff, including but not
limited to the dismissal of the defendant that was the subject of the proof of
service.
F.R.Civ.P. 4.1. SERVING OTHER PROCESS
F.R.Civ.P. 5. SERVING AND FILING PLEADINGS AND OTHER PAPERS