Want your guests to be able to bring a +1 and make sure this person also gets a confirmation email? Look no further! Just follow these simple steps.
1. From your Event Overview, head to the Settings tab.
2. Find the Additional Options section.
3. Select the checkbox that says "Send confirmation emails to additional guests."
4. Don't forget to Save in the upper right!
Any doubts on how to add +1s? Check out Can I allow my attendees to bring additional guests (+1s)?