Domain Security risk?

Hey folks, I have a customer that owns a domain and has owned it for years. Out of the blue they got an email from Asia Internet Network Information Center. They claim to be an approved Domain name dispute resolution committee member. When I researched it: http://www.adndrc.org/adndrc/index.html They do not appear to be "approved". Has anyone had dealings with them? Currently I am pushing this to ICANN and Network Solutions (domain registrar). Comments? Ideas? Thanks, Jim McBurnett Senior Network Engineer CCNP,CCVP, CCDA Thomas Glover Associates, Inc. 864-473-1200 x 106 office 864-641-5863 Cell