“120. In view of the aforesaid discussion, we hold:
120.1. The registration of FIR is mandatory under Section 154 of the Code, if the information discloses commission of a cognizable offence and no preliminary inquiry is permissible in such a situation.
120.2. If the information received does not disclose a cognizable offence but indicates the necessity for an inquiry, a preliminary inquiry may be conducted only to ascertain whether cognizable offence is disclosed or not. […] 120.5. The scope of preliminary inquiry is not to verify the veracity or otherwise of the information received but only to ascertain whether the information reveals any cognizable offence.
11.1. While considering the larger question, whether police is duty-bound to register an FIR and/or it is mandatory for registration of FIR on receipt of information disclosing a cognizable offence and whether it is mandatory or the police officer has option, discretion or latitude of conducting preliminary enquiry before registering FIR, this Court in Lalita Kumari [Lalita Kumari v. State of U.P., (2014) 2 SCC 1 :
PART D (2014) 1 SCC (Cri) 524] has observed that it is mandatory to register an FIR on receipt of information disclosing a cognizable offence and it is the general rule. However, while holding so, this Court has also considered the situations/cases in which preliminary enquiry is permissible/desirable. While holding that the registration of FIR is mandatory under Section 154, if the information discloses commission of a cognizable offence and no preliminary enquiry is permissible in such a situation and the same is the general rule and must be strictly complied with, this Court has carved out certain situations/cases in which the preliminary enquiry is held to be permissible/desirable before registering/lodging of an FIR. It is further observed that if the information received does not disclose a cognizable offence but indicates the necessity for an inquiry, a preliminary enquiry may be conducted to ascertain whether cognizable offence is disclosed or not. It is observed that as to what type and in which cases the preliminary enquiry is to be conducted will depend upon the facts and circumstances of each case.