Complementary tickets and passes are issued through the Box Office or Sales Console. When checking out, comp is a payment type you can use to issue any ticket type or pass for free.
For instructions on how to build a sale in either sales channel, check out these articles:
The exception to this rule is comping memberships, which has a different workflow. Follow the instructions in our article on comping memberships for details.
When issuing comps, keep in mind that comp sales do not automatically send confirmation emails. If you'd like to send a confirmation email with the comp, be sure to check the box for it right before the checkout button, and make sure you've put an email address in the email field.
If you didn't send a confirmation email with the comp order you can resend the receipt.