There are a couple of ways a Platform Admin can remove a user from your Formstack Account.
From the User Management Panel
Click on ‘Actions’ icon next to the user to remove and select ‘Remove’
If the user is assigned to a product, Choose whether to remove the user from the product or from your account altogether.
Confirm the removal of the user.
From the individual User Settings Page
Scroll down to the bottom of the user’s settings page.
If the user is assigned to a product, Choose whether to remove the user from the product or from your account altogether.
Confirm the removal of the user.