“34. The role of the Sub-Registrar (Registration) stands discharged, once the document is registered (see Raja Mohammad Amir Ahmad Khan [State of U.P. v. Raja Mohammad Amir Ahmad Khan, AIR 1961 SC 787] ). Section 17 of the 1908 Act deals with documents which require compulsory registration. Extinguishment deed is one such document referred to in Section 17(1)(b). Section 18 of the same Act deals with documents, registration whereof is optional. Section 20 of the Act deals with documents containing interlineations, blanks, erasures or alterations. Section 21 provides for description of property and maps or plans and Section 22 deals with the description of houses and land by reference to government maps and surveys. There is no express provision in the 1908 Act which empowers the Registrar to recall such registration. The fact whether the document was properly presented for registration cannot be reopened by the Registrar after its registration. The power to cancel the registration is a substantive matter. In absence of any express provision in that behalf, it is not open to assume that the Sub-Registrar (Registration) would be competent to cancel the registration of the documents in question. Similarly, the power of the Inspector General is limited to do superintendence of Registration Offices and make rules in that behalf. Even the Inspector General has no power to cancel the registration of any document which has already been registered.”