5 CFR §838.421

1. (a)A former spouse (personally or through a representative) must apply in writing to be eligible for a court-awarded portion of a refund of employee contributions. No special form is required.
2. (b)The application letter must be accompanied by—
   1. (1)A certified copy of the court order acceptable for processing that is directed at a refund of employee contributions.
   2. (2)A certification from the former spouse or the former spouse's representative that the court order is currently in force and has not been amended, superseded, or set aside;
   3. (3)Information sufficient for OPM to identify the employee or separated employee, such as his or her full name, date of birth, and social security number;
   4. (4)The current mailing address of the former spouse; and
   5. (5)If the employee or separated employee has not applied for a refund of employee contributions, the current mailing address of the employee or separated employee.