HappyFox lets you create Private ticket where the ticket will not be visible to the contacts and can be accessed by the agents only. 

Available plans: ✔️Mighty ✔️Fantastic ✔️Enterprise ✔️Enterprise Plus

With the option of Private ticket enabled during ticket creation, 

•  The customer will NOT be able to view the ticket from the contact panel.
• Email notifications will NOT be sent for tickets that have been created.

How to create a Private ticket?

• To create a new ticket, click on the +New Ticket button.

• Enter the Subject of the ticket, the Message and enable Private ticket (visible only to agents).
• Click on the Create Ticket button.

• A Private ticket can be identified by a slashed eye symbol beside the subject line.