IMPORTANT: Your App field "E-mail address" needs to be set to "optional" or "mandatory" for new visitors. For pre-registered visitors this is not required (it can be set to "hidden") but you'd be required to set an email address for your visitor from the backoffice website..
First enable "Email visitor on sign in/out" under Account Settings > Visit types > Notification settings as shown below:
Use the "Email visitor template" to edit the email that will be sent to your visitor when they sign out. You can use the following place holders:
%logopart% for your logo%company_name% for your company name%company_address% for your company address
Use the "Send test email" to receive a preview of what you will be sending out on your account email address.
Verify your email: