As single mother want put daughter in class 8, but not have proper document, then must not worry, because some school in Delhi allow admit with basic paper only, just need proof like birth paper, last pass mark sheet, and if not have something, can go to principal and give letter, they help. Some school also give help to single mother, like not take full fee or give fee in part. Go school early and ask nicely, they help if seat available. Private school sometimes ask more, but government school understand and help more.