In what type of fee simple may there be a condition attached to its transfer?

The correct answer is fee simple defeasible. This type of fee simple estate is characterized by the presence of a condition or restriction that must be adhered to in order for the property ownership to remain intact. If the condition is not met, the ownership can revert back to the original grantor or be transferred to a third party, depending on the specific terms set forth in the deed.

Fee simple defeasible can take two primary forms: fee simple determinable and fee simple subject to a condition subsequent. In both cases, the conditional nature of the estate differentiates it from a fee simple absolute, which provides complete ownership without any conditions attached. Therefore, the key feature of fee simple defeasible is its conditionality, making it a unique form of property ownership that requires adherence to specific terms.