No, a lawyer is not required. Authorization letters are formal letters that empower somebody else to take actions on your behalf.Sign Permit - Letter of Authorization. A "general power of attorney" is a document that grants the agent very broad rights to act on behalf of the principal. Just write the letter asking that with you signature that matches what is on file. Maybe add a number where you can be reached. Broadway Bank Attn: eBanking Department 1177 NE Loop 410. San Antonio, Texas 78209. If you need help completing the form, call the Texas State Disbursement Unit at (800) 252-8014. Direct Deposit Authorization Form (PDF).