1. Fill out the Application for Probate and Letters (AOC-E-201) 2. Beneficiaries must be listed on the form with the full names and addresses 3.Click "forms" and enter the form numbers below (all forms begin with AOC-E-__). This video will provide a step-by-step guide for completing the application and oath to open a full estate for a decedent. This video will provide a step-by-step guide for completing the application and oath to open a full estate for a decedent who left a will. The first step to beginning the probate process is filling out the correct forms. Step 2 - Fill Out Form AOC-E-201: This is the official application for Letters of Testamentary. This inventory lists all the bank accounts, assets, and personal property in the decedent's possession at the time of their passing. Usually, the personal representative opens a bank account for the estate, and deposits money from existing cash accounts into the estate account. Often, a married couple's estate plan consists of identical wills, each naming the other as executor of the deceased spouse's estate.