You can send a manual reminder to invited contacts who have not yet submitted a headshot.

From the Contacts page, select any number of contacts, and then from the Actions menu, select Send Reminders.

The user will receive an email reminder.

"Less than a minute ago" is a live variable that will adjust depending on how much time has passed since the initial invite was sent.

Note: Reminders won't be sent to contacts with a Suppressed status. If you need to email a suppressed contact, clear the suppression from their detail page first.