"“Anyone who’s purchased a foreclosed property in the last three years should really be concerned,” says George Babcock, a Providence lawyer who represents homeowners who have been foreclosed on."
This is why banks are freezing the foreclosure process. If the mortgagee uses sketchy practices to to prove they have the right to foreclose, then sells it to a new owner, that new owner may not really have title to the property. Lawyers being the opportunistic types they are, you can then have an interesting situation. What if the former owner (the original mortgagor) shows up and claims the house? Title insurance should protect the new owner, but this is yet another permutation in the unfolding weirdness of the post-crash housing market.