Hello Shreyash Verma... I am Kedar S. - CS Foundations student. I am also experiencing the same problem. I had uploaded my signature and 12th mark sheet in proper scanned form and visual clarity. Even after that my registration status is pending and they are mentioning the signature  is blurred and the certificate is not view able. I have tried to contact the helpdesk numbers:- 011-33132333, 011-66204999. But, they just shed off their responsibilities and provide other person's contact number and that person provides another person's contact number. I have tried to contact via email to various authorities of the institute but all in vain. Anyway, are you a student of Foundation/Executive? I thought we could help each other out of this as we are having the same problem. Reply ASAP.