Home |Dennis Joseph Dennis Joseph 1 Answers, 0 Claps, 632 Views Share × Feeds Questions Answers Guides I am from Karnataka. I have applied for OBC certificate and got an RD number but when I go to check the status it shows an invalid number why? RD number started as RD121. Try this link. Nadakacheri Status 1 0 632 No questions added by Dennis Joseph. I am from Karnataka. I have applied for OBC certificate and got an RD number but when I go to check the status it shows an invalid number why? RD number started as RD121. Try this link. Nadakacheri Status 1 0 632 No Guides added by Dennis Joseph.