Have you ever had an issue with somebody you've invited to Notable not getting the invite email? You can resend their invite right from your Users tab. Just click on "Add User" and enter their email address again. You'll see a message that looks like this:
Our system is smart; it can tell if they've activated their login or not. If they haven't, you can keep resending that invite as many times as you want. For more info about resending invites, check out this forum post.