Thrift Savings Plan improves security measures Published Sept. 5, 2007 By Staff Air Force Print News SAN ANTONIO, Tex. -- The Thrift Savings Plan will begin using account numbers to improve individual account holder security effective in October. TSP officials will mail new account numbers to participants in September --replacing the use of social security numbers as the primary means to identify current civilian and active-duty military participants. Account holders will use their account number and TSP Web passwords or ThriftLine personal identification numbers to log into the account access section of the TSP Web site or the ThriftLine. "To prepare for this change, all account holders should make sure the TSP has their correct mailing address," said Janet Thomas, human resource specialist at the Air Force Personnel Center, at Randolph Air Force Base, Texas. Air Force civilians and active-duty military members can update their addresses via the Defense Finance and Accounting Service myPay Web application. Address changes submitted via myPay automatically flow to the TSP and update people's TSP records. (Only those participants retired or separated from service can submit address changes directly to TSP.) After logging into myPay, click on "Correspondence Address." Enter your correct address, and save the changes. If unable to access myPay, submit address changes through your payroll office customer service representative at your base. TSP officials sent a letter to all participants in August advising of this change.