This is totally legitimate!
I used my coupon last Saturday to replace the interior doors that we've been meaning to get to for a while...at least the next owner of the house can enjoy them ;). Here's what you need to do if you'd like to save too.
Go to the following link:
(this link was taken directly from the source)
Fill in your information and submit...that's it!
It took a couple of days for mine to show up in my email inbox, (they do note that there is a processing time) but there it was and it worked perfectly! Make sure to share this info w/anyone that is moving soon. Happy Saving!