If you live in a state with property taxes, there's no such thing as owning property. You are basically renting the right to publically claim the property as your own from the county. And when buying and selling property, you're buying and selling the right to get to rent the public claim of ownership from the county. So in states with property taxes, you don't actually own anything, just the right to rent the claim that you do. Consequently there is no such thing as "free and clear."