Double check that the person in question does not appear in the "requiring invite" list. If they appear on the list then the school has not sent their invite yet.


Check that the person in question is listed in the "Pending Invite Response" list. If they appear on this list, it means that the person in question has not yet began their registration process. 


Check that the email address of the user is correct.


Ask the user to check their junk folder for an email from noreply@sims.co.uk


If the person in question does not appear in the "requiring invite" list or the "Pending Invite Response" list it is because they have already started the registration process using the email. Please double check that the user has not misplaced the email by mistake.