What form is issued to Airmen who complete 20 or more years of active military service?

The form issued to Airmen who complete 20 or more years of active military service is the DD Form 363AF. This document is specifically designed to serve as a certificate of retirement, marking the end of an Airman's career and acknowledging their years of dedicated service. It is an important official record that signifies the honor and commitment of the individual to their military duties and is often accompanied by retirement ceremonies and benefits.

Other options presented do not relate to the retirement process in the context of military service. For example, while DD Form 2542 is used for other administrative purposes, it does not pertain specifically to the retirement of Airmen. AF Form 1344 and AF Form 4369 may serve different functions within military administration but are not specifically linked to the issuance of a retirement certificate for Airmen with 20 or more years of service.