In conveyancing, a protectable disposition is a land transaction for value that must be completed by registration and can be secured by a priority search while it is completed.
In England and Wales, the term (used in HM Land Registry practice) means a registrable disposition under section 27 Land Registration Act 2002 of a registered estate or registered charge, including one treated as registrable by rule 38 Land Registration Rules 2003. Examples include a transfer of a registered title, grant of a registrable lease, legal charge/mortgage, or transfer of a registered charge. Gifts, assents and other non‑value deeds are not protectable.
Only a protectable disposition can be covered by an official search with priority (OS1/OS2), giving a priority period that protects the buyer’s or lender’s position until registration.
Across the UK and Ireland, the purpose is similar though terminology differs: in Scotland the analogue is a registrable deed protected by an advance notice under the Land Registration etc. (Scotland) Act 2012; in Northern Ireland and Ireland, priority searches protect registrable dealings for value.