Section 91 in The Code of Criminal Procedure
Title: Summons to produce document or other thing
(1) Whenever any Court or any officer in charge of a police station considers that the production of any document or other thing is necessary or desirable for the purposes of any investigation, inquiry, trial or other proceeding under this Code by or before such Court or officer, such Court may issue a summons, or such officer a written order, to the person in whose possession or power such document or thing is believed to be, requiring him to attend and produce it, or to produce it, at the time and place stated in the summons or order.
(2) Any person required under this section merely to produce a document or other thing shall be deemed to have complied with the requisition if he causes such document or thing to be produced instead of attending personally to produce the same.
(3) Nothing in this section shall be deemed--
(a) to affect sections 123 and 124 of the Indian Evidence Act, 1872 (1 of 1872), or the Bankers Books Evidence Act, 1891 (13 of 1891), or
(b) to apply to a letter, postcard, telegram or other document or any parcel or thing in the custody of the postal or telegraph authority.
Title: Procedure as to letters and telegrams
(1) If any document, parcel or thing in the custody of a postal or telegraph authority is, in the opinion of the District Magistrate, Chief Judicial Magistrate, Court of Session or High Court wanted for the purpose of any investigation, inquiry, trial or other proceeding under this Code, such Magistrate or Court may require the postal or telegraph authority, as the case may be, to deliver the document, parcel or thing to such person as the Magistrate or Court directs.
(2) If any such document, parcel or thing is, in the opinion of any other Magistrate, whether Executive or Judicial, or of any Commissioner of Police or District Superintendent of Police, wanted for any such purpose, he may require the postal or telegraph authority, as the case may be, to cause search to be made for and to detain such document, parcel or thing pending the order of a District Magistrate, Chief Judicial Magistrate or Court under sub-section (1).
Title: When searchwarrant may be issued
(1) (a) Where any Court has reason to believe that a person to whom a summons order under section 91 or a requisition under sub-section (1) of section 92 has been, or might be, addressed, will not or would not produce the document or thing as required by such summons or requisition, or
(b) where such document or thing is not known to the Court to be in the possession of any person, or
(c) where the Court considers that the purposes of any inquiry, trial or other proceeding under this Code will be served by a general search or inspection, it may issue a search-warrant; and the person to whom such warrant is directed, may search or inspect in accordance therewith and the provisions hereinafter contained
(2) The Court may, if it thinks fit, specify in the warrant the particular place or part thereof to which only the search or inspection shall extend; and the person charged with the execution of such warrant shall then search or inspect only the place or part so specified.
(3) Nothing contained in this section shall authorise any Magistrate other than a District Magistrate or Chief Judicial Magistrate to grant a warrant to search for a document, parcel or other thing in the custody of the postal or telegraph authority.
Title: Search of place suspected to contain stolen property forged documents etc
(1) If a District Magistrate, Sub-divisional Magistrate or Magistrate of the first class, upon information and after such inquiry as he thinks necessary, has reason to believe that any place is used for the deposit or sale of stolen property, or for the deposit, sale or production of any objectionable article to which this section applies, or that any such objectionable article is deposited in any place, he may by warrant authorise any police officer above the rank of a constable--
(a) to enter, with such assistance as may be required, such place,
(b) to search the same in the manner specified in the warrant,
(c) to take possession of any property or article therein found which he reasonably suspects to be stolen property or objectionable article to which this section applies,
(d) to convey such property or article before a Magistrate, or to guard the same on the spot until the offender is taken before a Magistrate, or otherwise to dispose of it in some place of safety,
(e) to take into custody and carry before a Magistrate every person found in such place who appears to have been privy to the deposit, sale or production of any such property or article knowing or having reasonable cause to suspect it to be stolen property or, as the case may be, objectionable article to which this section applies.
(2) The objectionable articles to which this section applies are--
(a) counterfeit coin;
(b) pieces of metal made in contravention of the Metal Tokens Act, 1889 (1 of 1889), or brought into India in contravention of any notification for the time being in force under section 11 of the Customs Act, 1962 (52 of 1962);
(c) counterfeit currency note; counterfeit stamps;
(d) forged documents;
(e) false seals;
(f) obscene objects referred to in section 292 of the Indian Penal Code (45 of 1860);
(g) instruments or materials used for the production of any of the articles mentioned in clauses (a) to (f).
Title: Power to declare certain publications forfeited and to issue searchwarrants for the same
(a) any newspaper, or book, or
(b) any document,
wherever printed, appears to the State Government to contain any matter the publication of which is punishable under section 124A or section 153A or section 153B or section 292 or section 293 or section 295A of the Indian Penal Code (45 of 1860), the State Government may, by notification, stating the grounds of its opinion, declare every copy of the issue of the newspaper containing such matter, and every copy of such book or other document to be forfeited to Government, and thereupon any police officer may seize the same wherever found in India and any Magistrate may by warrant authorise any police officer not below the rank of sub-inspector to enter upon and search for the same in any premises where any copy of such issue, or any such book or other document may be or may be reasonably suspected to be.
(2) In this section and in section 96,--
(a) "newspaper" and "book" have the same meaning as in the Press and Registration of Books Act, 1867 (25 of 1867);
(b) "document" includes any painting, drawing or photograph, or other visible representation.
(3) No order passed or action taken under this section shall be called in question in any Court otherwise than in accordance with the provisions of section 96.