DD Form 1853 at a glance
What it is: DD Form 1853 is the Verification of Reserve Status for Travel Eligibility.
Who signs: The applicant signs in box 8 and enters the date signed in box 9 as YYYYMMDD. The verifying official signs in box 16.
Part B may be completed by the requester's commander, First Sergeant, or a DoD personnel official with access to the Personnel Data System.
Reserve personnel use it to verify eligibility for space available transportation on DoD-owned or controlled aircraft.
A filled-in DD Form 1853 example: a reservist asks for travel verification

How to fill out DD Form 1853, box by box
Part A - To be completed by applicant
6. Unit/command name and 7. Unit/command address
8. Signature and 9. Date signed
Part B - 10. From and 11. To

The Reservist is an active reserve component member and is eligible for space available transportation in accordance with Regulation 4515.13-R.
The Reservist is authorized to so travel (not to exceed six months).
Part B is to be completed by the verifying official: in box 10 enter FROM and in box 11 enter TO, each as YYYYMMDD.
12. Name of verifying official, 13. Pay grade and 14. Title
More rules for DD Form 1853
Disclosure is voluntary; however, failure to disclose will prevent the applicant from traveling on a DoD-owned or controlled aircraft.
Sources
[1] DD Form 1853 (OCT 1999), Verification of Reserve Status for Travel Eligibility, Department of Defense (the Official source link on this page).






