If you want to make certain ticket categories private, you can use an invitation code to protect it. This is not to be confused with discount codes or protecting your event with a password.
Invitation codes are useful if you wish to sell tickets to the public and at the same time give special rates to groups of people such as members, colleagues, etc.
Here are 2 simple steps to creating an invitation code:
First, under Manage, click on Invitation Codes:
Next, enter the invitation code of your choice (Eg.VIP16), select the ticket categories this invitation code should apply to and create your invitation!