You can sign and submit a written statement appointing the person, or use our standard form SSA-1696, Appointment of Representative. This authorization letter appoints someone to act as the author's attorney-in-fact to represent them before the Social Security System.SSS Authorization Letter is a document for authorizing an individual on your behalf to transact with the Social Security System. In the letter published below, the. SSS Authorization Letter is a document for authorizing an individual on your behalf to transact with the Social Security System. 48)' to authorize the President of the. United States to locate, construct, and operate railroads in the. Last administration was June 2015. •. Reporting CTE assessment scores clarified in the Standard Achieved. 519.173 Joint payment or assignment.