If you send your invitations via the AwesomeBox site, we'll send email reminders to your invitees, but only to those who haven't already added a card. Reminders are sent two days after the first invitation is sent, and again two days prior to the deadline for participating.
The reminder emails will include a few examples of cards contributed so far and the names of people who have add cards. This helps generate greater participation
A host can also send a reminder or a progress message at any time, which is important if your box's deadline is longer than one week from the day you started it.
You can send a custom message to everyone invited or just those who have not created a card yet.
Go to the gear icon next to your name in the group project page, select "Message" and write your message.