For Federal and Postal employees under FERS, who now comprise the majority of the workforce in the Federal government, the issue of when to file for Social Security Disability benefits (SSDI) while concurrently filing for Federal Disability Retirement benefits through the U.S. Office of Personnel Management, is often a recurring question. On SF 3112A, at the very bottom of the standard form, there are two boxes to check with respect to whether (A) Social Security disability benefits have been applied for, and (B) whether the receipt has been attached and included with one’s Federal Disability Retirement application. […]