BFP is an abbreviation for “bona fide purchaser” (often “bona fide purchaser for value without notice”). It describes a person who acquires property honestly, for valuable consideration, and without actual or constructive notice of any prior equitable interest or other adverse claim. Across England and Wales, Scotland, Northern Ireland and Ireland, the concept is broadly similar, though it arises within different property, conveyancing and registration regimes and is primarily developed through case law rather than exhaustive statutory definition. In common law systems (England and Wales, Northern Ireland, Ireland), a BFP of a legal estate for value without notice is traditionally protected against prior equitable interests, forming a key element of land and personal property priority rules. In Scotland, the concept appears through good faith acquirer doctrines in relation to heritable and moveable property, operating within a mixed system of common law and statute. In practice, BFP status is crucial in disputes over competing interests, priorities, rectification of the register, and setting aside voidable transactions, and informs due diligence standards for conveyancers, lenders and transactional lawyers.