equal housing

[Lynn Y.]

Someone filed a complaint with state housing discrimination unit against one of my rentals.   It seems that she emailed me last october (6 month ago) asking one of my listings and informed me she has section 8.  Based on the complaint, I replied this rental has not been approved for section 8.  It also seemed she did not make another attempt to contact me again, rather, filed a complaint about income discrimination.

I unfortunately can not track that particular communication in my email inbox

Question:  Is it a correct understanding that a rental has to be approved by certain authority who manage section 8, and landlord has to pass certain registration process, in order to accept sec 8 payment? If that is true, on what ground complaint can be filed simply because landlord disclosed the status of this rental with sec 8 authority.  Or is this simply a mis-communication.  But if so, why someone will claim suffering so much emotion stress/other losses, take all the trouble of filing/notarize a complaint, other than just send me another email to clarify? 

Can anyone shed light on this?  Thank you very much.