53 Pa.C.S. § 6114
Where, after reasonable efforts, service of process for a notice or citation for any code violation for any real property owned by a corporation, association or trust cannot be accomplished by handing a copy of the notice or citation to an agent, executive officer, partner or trustee of the corporation, association or trust or to the manager, trustee or clerk in charge of the property, the delivery of the notice or citation may occur by registered, certified or United States Express mail, accompanied by a delivery confirmation:
(Oct. 22, 2014, P.L.2637, No.171, eff. 60 days)