Write to ondemand@sans.org to request an extension. The cost is $199 for each one-month extension.
Note: If you are registered for a GIAC certification attempt with your OnDemand training, you must register for an extension through the "GIAC Exam Engine" link located on your SANS Portal Home Page. Go to Exam > Certification to purchase the extension once your certification attempt expires.
Purchasing an extension will add 30 days to the date of your current expiration date. The extension does not add 30 days from the date you
purchase the extension, but rather 30 days to your current expiration
date. Please be advised that if you wait for a number of weeks before
you purchase your extension, you will not be taking advantage of the
full 30 days.