California Code, Probate Code - PROB § 12250

(a) When the personal representative has complied with the terms of the order for final distribution and has filed the appropriate receipts or the court has excused the filing of a receipt as provided in Section 11753, the court shall, on ex parte petition, make an order discharging the personal representative from all liability incurred thereafter.

(b) Nothing in this section precludes discharge of the personal representative for distribution made without prior court order, so long as the terms of the order for final distribution are satisfied.