20 Pa.C.S. § 3503: Notice to parties in interest.

The personal representative shall give written notice of the filing of his account and of its call for audit or confirmation to every person known to the personal representative to have or assert an interest in the estate as beneficiary, heir, next of kin or claimant, unless the interest of such person has been satisfied or unless such person fails to respond to a demand under section 3532(b.1) (relating to at risk of personal representative).