1:5-2. Manner of Service
Service upon an attorney of papers referred to in R. 1:5-1 shall be made by mailing a copy to the attorney at his or her office by ordinary mail, by handing it to the attorney, or by leaving it at the office with a person in the attorney's employ, or, if the office is closed or the attorney has no office, in the same manner as service is made upon a party. Service upon a party of such papers shall be made as provided in R. 4:4-4 or by registered or certified mail, return receipt requested, and simultaneously by ordinary mail to the party's last known address; or if no address is known, despite diligent effort, by ordinary mail to the clerk of the court. Mail may be addressed to a post office box in lieu of a street address only if the sender cannot by diligent effort determine the addressee's street address or if the post office does not make street-address delivery to the addressee. The specific facts underlying the diligent effort required by this rule shall be recited in the proof of service required by R. 1:5-3. If, however, proof of diligent inquiry as to a party's whereabouts has already been filed within six months prior to service under this rule, a new diligent inquiry need not be made provided the proof of service required by R. 1:5-3 asserts that the party making service has no knowledge of any facts different from those recited in the prior proof of diligent inquiry.
