Similar to "uninsurable title:, ownership of land which is defective such that no one would wish to purchase it.
Title which contains defects which would allow a purchaser to be released from her obligation to purchase.
Title to real estate that is not marketable and one a title insurance company refuses to insure due to some existing claim or encumbrance against the property.
Any title that contains defects that would allow a person to be released from the obligation of the purchase.
Title which contains defects that would allow a purchaser to be released from his obligation to purchase.