20 Pa. C.S. § 5165
The guardian of the estate of a minor shall be given notice of proceedings affecting the interest of his ward in any property to which his appointment extends, in the same manner as is provided for notice to persons of full age having similar interests. If the minor has no guardian authorized to act for him in respect to the interest involved, the court in which the proceedings are pending, upon petition or on its own motion, may appoint a guardian ad litem for the minor, to whom the required notice can be given. Nothing herein shall be construed to require the appointment of a guardian ad litem to represent the interest of a minor in an estate unless the court, upon petition or on its own motion, shall consider such appointment to be advisable. The court may dispense with the appointment of a guardian ad litem when there is a living person sui juris having a similar interest, or where the minor is issue of a living ancestor sui juris interested in the estate whose interest is not adverse to that of the minor.
20 Pa.C.S. § 5165