If you are getting “email ID not exists” while downloading your NPTEL hall ticket, it usually means a mismatch between the registered email and the one entered. First, check if you used the same email ID that you registered with NPTEL/SWAYAM. Try logging into the NPTEL portal and verify your profile details. If the issue still persists, clear cache or try another browser. As a last step, contact NPTEL support (support@nptel.iitm.ac.in) with your registered email and course details for resolution.