California Code, Probate Code - PROB § 210

(a) An affidavit of death executed by a person having knowledge of the facts. The affidavit shall include a particular description of the real property and an attested or certified copy of a record of the death made and filed in a designated public office as required by law.For purposes of this subdivision, a certified copy issued in this state shall include any copy issued pursuant to Section 103525 of, subdivision (a) of Section 103526 of, or paragraph (1) of subdivision (b) of Section 103526 of, the Health and Safety Code.

(b) A certified copy of a court order that determines the fact of death made pursuant to Chapter 1 (commencing with Section 200) or pursuant to another statute that provides for a determination of the fact of death.