How do you get a DD form 217 AF1 replacement?

A DD Form 217, an identity card, is the Certificate of Service, Armed Forces of the United States. It certifies that the named veteran honorably served on active duty, and names the veteran's branch of service, e.g., United States Air Force, etc. On the back of the card, the veteran's period of active duty is listed, along with the veteran's signature and the signature of the certifying officer.