I've sent the save the dates and two of my cousins have already told me they cannot attend. Do I still send them invitations? I've read that etiquette says not to, but I feel like I would still want the invitation. Are there exceptions to this rule? Is this one of those weird non-rule rules? Here's the source, it's #6.
http://www.huffingtonpost.com/2013/08/24/wedding-etiquette_n_3806349.html