Dear Aspirant, you must get the signature on your study certificate of BEO (Block Education Officer) or DDPI (Deputy Director of Public Instruction) as the study certificate is a letter which states that you have studied in the respective Primary/ Higher Primary/High School for these standards like 6th, 8th, 10th, 12th etc . I hope you are clear now. If you have any other queries feel free to ask. All The Best!!!