Hi. Assuming from your profile, I believe you are a candidate from the state of Karnataka. Here is the eligibility criteria to obtain the certificate of rural area -

You have to study from class 1 to class 10 in order to obtain the certificate, which is issued by your school authorities. Since you fail to fit in this criteria, it is difficult for you to do so. But I will advice you to contact the office of your tehsildar or DM.