California Code, Probate Code - PROB § 1250

(a) At any time after the issuance of letters in a proceeding under this code for the administration of a decedent's estate, any person interested in the estate, whether as devisee, heir, creditor, beneficiary under a trust, or as otherwise interested, may, in person or by attorney, file with the court clerk a written request for special notice.

(b) The request for special notice shall be so entitled and shall set forth the name of the person and the address to which notices shall be delivered pursuant to Section 1215.

(c) Special notice may be requested of one or more of the following matters:

(d) Special notice may be requested of any matter in subdivision (c) by describing it, or of all the matters in subdivision (c) by referring generally to “the matters described in subdivision (c) of Section 1250 of the Probate Code” or by using words of similar meaning.

(e) A copy of the request shall be delivered pursuant to Section 1215 to the personal representative or to the attorney for the personal representative. If personally delivered, the request is effective when it is delivered. If mailed or electronically delivered, the request is effective when it is received.

(f) If the original of the request is filed with the court clerk, it shall be accompanied by a written admission or proof of service.