When purchasing a piece of real property, you anticipate receiving a deed to it that indicates you are the sole owner and that no one else has a right to the property. That could be a challenge with certain tracts of land because previous owners and others failed to appropriately handle issues involving the title in the past.
Unless you take care of these issues, you may not truly have ownership in the property. To rectify this situation, you could initiate a "quiet title" action. This proceeding may remove any specifically identified adverse claims against the property that would interfere in your ownership of it.