Why was certificate dd256a used?

The DD Form 256A, also known as the Certificate of Release or Discharge from Active Duty, is primarily used to verify a service member's honorable discharge from the U.S. Armed Forces. It serves as official documentation for veterans, providing proof of their military service and discharge status, which can be necessary for accessing benefits, employment opportunities, and various veterans' services. This certificate is particularly important for those who wish to demonstrate their service history in civilian life.