You can sign and submit a written statement appointing the person, or use our standard form SSA-1696, Appointment of Representative. You can either type it using Microsoft Word on your PC or handwrite it.SSS Authorization Letter is a document for authorizing an individual on your behalf to transact with the Social Security System. Fill-out the BPI Card Delivery Authorization form and provide a copy of your ID along with the ID of your representative. 3. If you need help filling out the SS-5, a Social Security representative will help you. Timeline for Receiving Your SSN Card If You Visited an SSA Office.