The register is meant to be a complete picture of title, yet the rules deciding what binds a buyer despite no entry are where most of the difficulty lies. This chapter opens with the purpose of registration, the mirror, curtain and insurance principles, and the three parts of every individual register, before turning to the classes of title the Land Registry can grant and the events that trigger compulsory first registration or require a disposition to be completed by registration. It then works through the priority rules in sections 28 and 29, the overriding interests — including actual occupation and legal easements — that bind a purchaser without appearing on the register, and the use of notices, restrictions and overreaching to protect or clear third-party interests. It closes with what happens when the register is wrong: alteration, rectification against a proprietor in possession, and the indemnity scheme that gives the state guarantee of title its teeth.