Candidates must apply in the Application Format,The completed application form must reach the Joint Secretary (Recruitment), Union Public Service Commission, Dholpur House, Shahjahan Road, New Delhi-110069 on or before 15 th September 2011.Candidates who wish to apply for more than one post should submit separate application accompanied by the prescribed fee for each post. (c) Candidates are requested to attach with the application a self-addressed post card bearing total postage worth Rs. 6.00 affixed thereon.
http://www.upsc.gov.in/recruitment/advt/2011/16_11_eng.pdf