we had the same thing in our neighborhood like a year or so ago.. we got a letter in the mail saying that they were reappraising our home for tax purposes, read, they wanted to raise them, lol.. anyhoo's, yah, got the letter, then no one ever even came out to our place..
we also had a fuckup where i accidentally underpaid my home owners by like $39 or so, and then they had to come out to the house and reinspect it so that they would recover us again.. they never came in the house at all.. i don't even know when they stopped by, but they had obviously been in our yard by some of the shit they had on the list that we had to fix or we wouldn't be covered..
so, from all that i've experienced with this type of shit, they never come inside of your home, and more then likely, you'll never even know that they were there unless you so happen to catch them snooping around your yard..