You have to call the Mello Roos district and give them an address or APN#
MELLO-ROOS Q3 (949)955-1500
MELLO-ROOS R5 (949)955-1500
You can view a short video on how to find the mello Roos of a property as well right here: http://socaloceanviews.com/about/mello-roos/ , scroll down and watch the short video.
Let me know if you need anything else?