You must provide acceptable documentation of your preference or appointment eligibility. Acceptable documentation may be:
A copy of your DD-214, "Certificate of Release or Discharge from Active Duty," which shows dates of service and discharge under honorable conditions.
A "certification" that is a written document from the armed forces that certifies the service member is expected to be discharged or released from active duty service in the armed forces under honorable conditions not later than 120 days after the date the certification is signed.
NOTE: Prior to appointment, an agency will require the service member to provide a copy of the DD-214.