Safety....
Not strictly true as paper forms do still exist. For expenses , I believe it is JPA Form 016 that you submit to your HR Admin, then they will consolidate all the Unit claims onto a JPA Form 016A and send it to the JPAC EC for entry onto JPA and subsequent payment.
All JPA Paper forms are available on the AFPAA Info Centre, under documentation. You can print them off and have your own secret cache!!