(a) Upon good cause shown, the Court may enter a special order directing service by ordinary mail directed to defendant's last known residence or other address.(b) The requirements of good cause shall be satisfied upon the filing of an affidavit by plaintiff setting forth the extent of unsuccessful efforts to make service if the address is known, or the nature and extent of a good faith investigation made to ascertain the present residence and whereabouts of a defendant whose whereabouts are unknown. (1) Such affidavit shall set forth the following information: (i) the time and place at which the parties last resided together as spouses;(ii) the last time the parties were in contact with each other, and the defendant's address and telephone number at that time;(iii) the name and address of the last employer of the defendant either during the time the parties resided together or at a later time, if known to the plaintiff;(iv) the names and addresses and relationship to defendant of those relatives known to be close to the defendant;(v) proof that inquiry has been made of applicable voter registration records in an effort to ascertain the address of the defendant;(vi) any other information which could furnish a fruitful basis for one truly bent on learning the present whereabouts of the defendant;(vii) such affidavit should detail the particular efforts made to ascertain the defendant's present address and to effect service.(2) A petition seeking such relief shall be filed with the Court requesting entry of a special order for service. The proposed order accompanying such Petition shall set forth the specific address at which counsel or unrepresented party will serve process on the defendant by regular mail. No hearing shall be held on such Petition unless the Court directs otherwise.(c) When service of the Complaint in Divorce is made by registered mail, or by Acceptance of Service pursuant to Pa.R.C.P. 402(b), service shall not be deemed complete unless (1) the signature on the return receipt or on the Acceptance of Service form is identified to be that of the defendant by affidavit or verification of the plaintiff or other person familiar with said signature, or (2) where service is accepted by an unauthorized agent of the defendant, an affidavit or verification as to the identity of the agent and his or her relationship to the defendant.Amended effective 9/1/2016; amended effective 4/8/2019.