California Code, Probate Code - PROB § 10583

(a) Notice of proposed action need not be given to any person who, in writing, waives the right to notice of proposed action with respect to the particular proposed action. The waiver may be executed at any time before or after the proposed action is taken. The waiver shall describe the particular proposed action and may waive particular aspects of the notice, such as the delivery, mailing, or time requirements of Section 10586, or the giving of the notice in its entirety for the particular proposed action.

(b) Notice of proposed action need not be given to any person who has executed the Statutory Waiver of Notice of Proposed Action Form prescribed by the Judicial Council and in that form has made either of the following: