I never received any of the mailings. :-)
If they ever contact me I’ll just play dumb. (Which won’t be too difficult)
If they can’t prove I received them how can I fill them out?
.
I wouldn’t have, but they took to calling me too. I forgot that when I did the original post.
When I worked in the phone area of the Census Bureau we did follow-ups on the forms that were sent back in. Even if one only filled out their name or number of people living in that particular dwelling. I would advise not mail your form back. (You did not receive one)