Re: 2010 Census - Fill it out, send it back
Maybe check with your neighbors in the actual unit 4 to see if they got theirs or not.
We got two census packets at our condo. One addressed to Unit 4 and one to Unit 12. Our address is the latter, but according to the county our unit is the fourth unit in its building so all of our property tax info says Unit 4. I haven't looked inside the census packet yet, but I presume I can just toss one of them.
Maybe check with your neighbors in the actual unit 4 to see if they got theirs or not.