This article will walk you through how you can prevent access to reports.
Navigate to Settings -- Office Settings -- Interacting with my Clients and agents -- Report Delivery Options
Here is where you select the options that will force inspections to be paid and signed for before being viewed.
Now clients and agents cannot access your report without a client signature nor payment. This will prevent access to your report without the signature and payment.
Note: This setting is on by default, so changing this is uncommon. Please be sure to hit Save Settings after making adjustments!