Contact your bank for a power of attorney form. No, a lawyer is not required.COMPLETING THE PETITION FOR PROBATE, DE-111. Write your name and address in the top left box. For all new bank account(s) being added: 1) Bank account must be in the agency's name. To start the process of obtaining a letter of administration, you must fill out Form DE150. Please be advised that. If you need to show someone your bank balance, you simply give them a copy of your last bank statement. Complete the Authorization Agreement for Automatic Bank Deposit form on the back of this letter. If you need to show someone your bank balance, you simply give them a copy of your last bank statement.