Depending on your state -- either a real estate attorney or title company. Buying a property requires the transferring the ownership -- it is more than the exchange of money for goods. You may want to consider a title search -- to make sure that this property does not have any liens, additional owners or unpaid debts. If you buy the home without clearing up these issues -- you may find yourself now responsible for covering any unpaid bills/liens or only own a part of it.