You can cancel your subscription in the ViewPDF member's area:
- Login to ViewPDF
- Click the 'Account' button in the top-right
- Select your currently active subscription, for example 'ViewPDF Annual Plan'
- Click the 'Cancel Subscription' link
Alternatively you can create a ticket at the following link and we will cancel your membership for you: https://viewpdf.freshdesk.com/support/tickets/new