The community I live in sent surveys by mail to all residents. In the survey they say "You are welcome to remain anonymous, but feel free to include your contact information. In the upper left corner of the letter (the survey is on the back side) is a 4 digit number (6768). Another resident has a different 4 digit number (6798). I am going to ask them point blank if this is really anonymous. What I would like to know is if there has been a regulatory / legal violation if they admit it is not really anonymous. I live in AZ.Thanks,