@Jay Hinrichs
@Skip Rivera
@Wayne Brooks
Yes and no. Yes, a tax foreclosure is supposed to wipe out everything junior in priority. But no, that does not always guaranty clean title. I have bought scores of properties at tax auction and I'm also a real estate lawyer. Most of the time you can transfer title and get title insurance, especially if you wait one year after auction. (Title company likes wait some time to see if anyone challenges sales.) But I have had numerous instances, including one just last month that killed a sale, where title company would not insure. This particular case was a deed of trust from 2008, which title company said was too recent, they would not take the risk.
In those cases, you go to one of a few shops that basically issue re-insurance to the title company. They research title, which takes one or two months, and check all notices delivered as part of the sale. In every one of my cases, they have been finally willing to certify the sale, which allows the title company to issue insurance. However, I have heard of cases where they decided they would not stand behind the sale. The situation above might result in one of those cases, where various people with claim to title probably will not be served with official notice of the sale.
So yes, usually you get clean title. But yes, there is also a possibility that the title company might not be willing to issue insurance when you go to sell it.