Give information on FIR.
Every information relating to the commission of a cognizable offenceif given orally to an officer-in-charge of a police stationshall be reduced to writing by him or under his directionand be read over to the informant; and every such informationwhether given in writing or reduced to writing as aforesaid shall be signed by the person giving itand the substance thereof shall be entered in a book to be kept by such officer in such form as the State Government may prescribe in this behalf.
A copy of the information as recorded under sub-section
(i) shall be given forthwithfree of costto the informant.
Any person aggrieved by a refusal on the part of an officer-
in-charge of police station to record the information referred to in sub-section (1) may send the substance of such informationin writing and by post to the Superintendent of Police concernedwho if satisfied that such information discloses the commission of a cognizable offence shall either investigate the case himself or direct an investigation to be made by any police officer subordinate to himin the manner provided by this Codeand such officer shall have all the powers of an officer-in-charge of the police station in relation to that offence.
The provision in section 154 regarding the reduction of oral statement to writing and obtaining signature of the informant to itis for the purpose of discouraging irresponsible statement about criminal offences by fixing the informant with the responsibility for the statement he makes.

Refusal by the informant to sign the first information is an offence punishable under section 180 of the Indian Penal Code. The absence of signatures on the first information report by the informanthoweveris not necessary to the extent that it will vitiate and nullify such report. The first information is still admissible in evidence.

In order to constitute an FIR in terms of section 154 of the Code. of Criminal Procedure1973 two conditions are to be fulfiUed:-
(a) what is conveyed must be an information; and
(b) that information should relate to the commission of a cognizable offence on the face of it.

In other wordsFIR is only a complaint to set the affairs of law and order in motion and it is only at the investigation stage that all the details can be gathered. In one of the judgmentsthe Madhya Pradesh High Court observed that the report of the crime which is persuading the police machinery towards starting investigation is FIRsubsequent reports are/were writtenthey are not hit under section 161 of the Code of Criminal Procedure1973 and cannot be treated as such.