Dear Aspirant,

Admit card is very necessary for giving any competitive exam as you can't enter the examination hall without admit card and coordinators check all your documents before entering the examination hall and verfiy your identity also.The following details should be present on your admit card

1)Candidate's Name

2)DOB

3)Category(General/SC/ST)

4)Candidate's Photograph and signature

5)Timings and Venue

Please visit indian army official website http://joinindianarmy.nic.in and contact them through phone or email-id and discuss your issue with them before 11 September.I would advise you to please carry your identity proof like Aadharr Card,Pan Card or your college id card also alongwith your admit card.Don't worry  call them during office hours

Thank You.