Send Invite works the same way as inviting guests with a couple of changes.
Click Send Invite
Instead of having a confirmation pop-out you are presented with the following options:
You can opt to send the invite to a single recipient – this could be a named person responsible for a number of guests on your event and you do not have the contact details of these people.
This will send an email to the address supplied with an attachment that contains the unique codes of all unregistered guests. It will be up to the recipient to then tell the guests that they will need to download the app and enter the code that they have been assigned.
Alternatively, you can select specific people from the group to send the invite to, or check the box to send to all. Please be aware, this list will only contain unregistered guests, you will not re-send the invite to those that have already accepted.