When someone requests membership in a group, and is not yet in any other groups.io groups (i.e., they are not yet a member of groups.io), groups.io sends an email asking them to "confirm" that they requested membership. This is to prevent someone from signing up someone else (like, if I ordered 10 pizzas sent to your house:). The person needs to click on the "confirm membership" link within the email to confirm that they, indeed, requested the membership. Sometimes they don't, or the email goes into spam, or who knows what. If you continue to see the "NC," you can click on the option to "resend confirmation email" and hope they get the resent email. If it still continues, you can try to contact the person outside the system (via your own email) in case groups.io emails are going into the person's spam folder, and ask them to locate the confirmation email and click on on the link. If they STILL can't find it (and this has happened a number of times in my own group), and you know you want to admit the person to your group, you can email Mark and ask him to let them in.
Until the person is confirmed, even though they look like a member of your group they will not be able to post messages to the group or access any group content. They're essentially on hold.
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J
