No information is available for this page. In the box that reads "Estate of," write the name of the decedent.Leave the box that reads case number, hearing date, Dept, blank. Forms on this page are always up to date. In this video, we're going over two forms, DE 140 which is the Order for Probate, and DE 150 which are the Letters, Testamentary, or Letters of Administration. Revised Date, Fillable, Mandatory. This guide is designed to help you fill out the forms yourself. It is not intended to provide legal advice nor strategy as to how to complete the case. A letter of last instruction is an organized way for you to give your family all the facts about your finances—and have a basic tool for your own. Prior to the Operative Date, all applications, regardless of location, are required to use the forms listed under the "Chapter 1" column.