Yes, your Digital Signature Certificates can be renewed easily within seven days before the digital signature validity expires. However, for the renewal, the applicant’s name should not be changed. Doing so would qualify it as a new application and not a renewal. Though the applicant’s name cannot be changed at the time of renewal, you can change your postal address and contact details. If you do not renew digital signature within the above mentioned time, you will have to file a new application for the Digital Signature Certificate.