Rule 106 Method of Service
Section 5.
(a) Unless the citation or court order otherwise directs, the citation must be served by:
(1) delivering to the defendant, in person, a copy of the citation, showing the delivery date, and of the petition; or
(2) mailing to the defendant by registered or certified mail, return receipt requested, a copy of the citation and of the petition.
(b) Upon motion supported by a statement–sworn to before a notary or made under penalty of perjury–listing any location where the defendant can probably be found and stating specifically the facts showing that service has been attempted under (a)(1) or (a)(2) at the location named in the statement but has not been successful, the court may authorize service:
(1) by leaving a copy of the citation and of the petition with anyone older than sixteen at the location specified in the statement; or
(2) in any other manner, including electronically by social media, email, or other technology, that the statement or other evidence shows will be reasonably effective to give the defendant notice of the suit.