Rule 15(c)(3) notice does not require actual service of process on the party sought to be added; notice may be deemed to have occurred when a party who has some reason to expect his potential involvement as a defendant hears of the commencement of litigation through some informal means. See Varlack v. SWC Caribbean, Inc., 550 F.2d 171, 175 (3d Cir. 1977) (holding that a person who the plaintiff sought to add as a defendant had adequate notice under 15(c)(3) when, within the relevant period, the person by happenstance saw a copy of the complaint naming both the place where he worked and an 'unknown employee' as a defendant, which he knew referred to him); see also Berndt v. Tennessee, 796 F.2d 879, 884 (6th Cir. 1986) (notice need not be formal); Eakins v. Reed, 710 F.2d 184, 187-88 (4th Cir. 1983) (same); Kirk v. Cronvich, 629 F.2d 404, 407-08 (5th Cir. 1980) (same). At the same time, the notice received must be more than notice of the event that gave rise to the cause of action; it must be notice that the plaintiff has instituted the action. See Bechtel v. Robinson, 886 F.2d 644, ...