20 Pa. C.S. § 3538
A personal representative may administer an estate on the assumption that no person born out of wedlock is entitled to share as a distributee unless the personal representative has knowledge or has received notice that such a person with possible distributee's rights exists. If a personal representative has distributed an estate, or part thereof, in good faith without knowledge of a person born out of wedlock who has rights as a distributee, said distribution actually made shall not impose liability on the personal representative. Except as herein otherwise provided, a person born out of wedlock shall have the same rights in an estate and shall be subject to such time limitations and to such procedures as are applied to any other heir or claimant against an estate.
20 Pa.C.S. § 3538