16 Pa. Stat. § 5614
Notice of the time and place of said meeting shall be given in the manner provided by law for the service of summons in a personal action upon all parties allowed damages and against whom benefits have been assessed, as shown by said schedule, if the said parties can be found in the county, or upon an adult person, if any, residing upon the property affected in case the owner or reputed owner cannot be found, and to all others by publication in the newspaper or newspapers in which the first notices of said view were published. When no service is made upon the owner, reputed owner or upon an adult person residing upon the property affected, said notice, where publication thereof has also been made, shall be deemed to have been properly served if tacked or conspicuously posted on the premises. The court may provide by whom the notice provided by this act shall be posted, given and served, and fix the compensation for said service.
16 P.S. § 5614