SC/ST/ valid OBC-NCL/Persons with Disability(PWD) Certificate issued by the competent authority for those under reserved category.Yes OBC NON Creamy Layer certificate is in the prescribed format issued by the competent authority for the candidates claiming admission against OBC-NCL Seats.It must be valid and must be as per the prescribed format of Government of India.T he committee will verify the caste/category certificates, marksheet,PRC etc at the time of online admission.So you should keep the copy of it with original.