Sometimes you need to give people free access to your paid events, because they paid elsewhere, you want to give them a free trial, or some other reasons. To do so, you can create a coupon in Luma.
Go to the Registration tab of your Manage Event page, and click on Create Coupon. Give it a name, and specify how many times it can be used for. Save it, and send the coupon to your guest.
When your guest goes to the event page, they can click on Use a Coupon to enter the coupon code. Then they will be able to register for your event for free, without needing to enter any payment information.
You can see who has redeemed your coupons on the Guest List.