Which unrecorded interests remain valid against a Bona Fide Purchaser (BFP)?

The correct choice highlights that long-term leases, particularly when the tenant is in possession of the property, retain their validity against a Bona Fide Purchaser (BFP). This is grounded in the principle that prior possession is notice to subsequent purchasers. If a tenant occupies the property, a BFP is presumed to be aware of the tenant's leasehold interest, and thus, cannot ignore or invalidate the lease simply because it is unrecorded. This protection serves to uphold the rights of current occupants against new buyers who may not have taken the time to verify existing arrangements.

In contrast, verbal agreements, while they may be enforceable between the parties involved, generally lack the formal weight needed to stand against a BFP due to the absence of documentation and recordation. Furthermore, not all leases are treated equally; only those that meet certain conditions, such as duration and occupancy, may secure protection against BFPs. Lastly, easements established by adjacent owners do have a level of enforceability, but their protection against BFPs can be complex and might not apply universally without appropriate notice or documentation, unlike the more straightforward scenario of a tenant in possession.