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Initiation of a criminal case: FIR, Zero FIR, preliminary enquiry, investigation and complaint

Bharatiya Nagarik Suraksha Sanhita · Unit I · Topic 3 of 25 · 8 min read

How a criminal case begins under the BNSS: information in cognizable cases under section 173 (including Zero FIR and e-FIR), the new preliminary enquiry, remedies when the police refuse to register, non-cognizable information, the stages and powers of investigation, and the private complaint.

On this page
  1. 1. Information in cognizable cases: section 173 (old s.154)
  2. 2. Zero FIR
  3. 3. Preliminary enquiry: section 173(3) (new)
  4. 4. Remedies when the police refuse to register
  5. 5. Non-cognizable information: section 174 (old s.155)
  6. 6. Investigation: sections 175 193
  7. 7. Complaint
  8. 8. Problem
  9. How this is examined
Cases checked to exist. Read the judgment before quoting a holding.

Every case cited here has been checked to exist — the citation resolves and names the right parties. The propositions attributed to each case have not been verified line by line against the judgment. Case names link through to the full judgment: read it before quoting a holding in an examination answer, and never carry a proposition from notes into court on trust.

Two doors into the criminal process. A case starts either with information to the police (an FIR, leading to investigation and a police report) or with a complaint to a Magistrate. The papers set both short notes (“Zero FIR”, “Complaint”, “Initiation of a criminal case”) and a problem in almost every sitting on a police officer who refuses to register an FIR.

1. Information in cognizable cases: section 173 (old s.154)

Every information relating to the commission of a cognizable offence, irrespective of the area where the offence is committed, may be given orally or by electronic communication to an officer in charge of a police station (s.173(1)).

The FIR is not substantive evidence. It sets the criminal law in motion and can be used to corroborate or contradict its maker. Delay in lodging it is not fatal in itself but must be explained.

Registration is mandatory. In Lalita Kumari v. Government of U.P., 2013 INSC 748, (2014) 2 SCC 1, a Constitution Bench held that registration of an FIR is mandatory where the information discloses a cognizable offence, and that no preliminary inquiry is permissible in such a case. It allowed a limited preliminary inquiry, to be finished within seven days, only in categories such as matrimonial disputes, commercial offences, medical negligence, corruption and cases of abnormal delay. An officer who fails to register must face action.

2. Zero FIR

A Zero FIR is an FIR registered by a police station that has no territorial jurisdiction over the place of the offence. It is given a “zero” number and then transferred to the police station that has jurisdiction, which registers it afresh and investigates. The practice grew up after the Justice Verma Committee report of 2013 and was supported by police directions; the BNSS puts it on a statutory footing with the words “irrespective of the area where the offence is committed” in s.173(1). The expression “Zero FIR” itself does not appear in the section.

3. Preliminary enquiry: section 173(3) (new)

For a cognizable offence punishable with three years or more but less than seven years, the officer in charge may, with the prior permission of an officer not below the rank of Deputy Superintendent of Police, and considering the nature and gravity of the offence:

This is a statutory departure from the strict rule in Lalita Kumari for the middle band of offences. For offences of seven years and above, and below three years, registration remains the rule.

4. Remedies when the police refuse to register

5. Non-cognizable information: section 174 (old s.155)

The officer enters the substance in the prescribed book, refers the informant to the Magistrate, and forwards the daily diary report of such cases to the Magistrate fortnightly (s.174(1), new). He cannot investigate without the Magistrate's order (s.174(2)); with an order he has all powers except arrest without warrant (s.174(3)). If a case involves two or more offences and at least one is cognizable, the whole case is treated as cognizable (s.174(4)).

6. Investigation: sections 175–193

“Investigation” covers all proceedings for collecting evidence by a police officer (s.2(1)(l)). Its stages, as described by the Supreme Court in the CrPC cases, are: proceeding to the spot; ascertaining facts and circumstances; discovery and arrest of the suspect; collection of evidence by examining persons, searching places and seizing things; and forming an opinion whether there is a case to place before a Magistrate, followed by the police report.

7. Complaint

A complaint (s.2(1)(h)) is an allegation to a Magistrate, oral or in writing, that some person has committed an offence, made so that the Magistrate takes action. It need not be in any form; it must disclose facts constituting an offence. It can be made by anyone, unless a statute restricts the right (for example, ss.215, 219 and 222 require complaints by particular persons). A police report is not a complaint, except a report that reveals only a non-cognizable offence. The Magistrate examines the complainant on oath (s.223), and the Unit II note follows the complaint from there.

8. Problem

‘A’ approaches the officer in charge of a police station to file an FIR regarding a cognizable offence. The officer refuses, saying the offence was not committed within the jurisdiction of his station. Can he refuse on this ground? What can A do? (February 2025; a similar problem in June 2025.)

Issue. Whether territorial jurisdiction is a ground for refusing to record information of a cognizable offence, and what remedies A has.

Law. Section 173(1) BNSS requires every information of a cognizable offence to be recorded “irrespective of the area where the offence is committed”. Lalita Kumari makes registration mandatory where a cognizable offence is disclosed. Remedies lie under s.173(4) (the SP) and s.175(3) (the Magistrate, on an application with affidavit).

Application. The officer's only objection is jurisdiction. That is exactly what the words “irrespective of the area” exclude. He must record a Zero FIR, give A a free copy, and transfer it to the police station having jurisdiction. If the offence fell in the 3–7 year band, he could at most seek the DSP's permission for a preliminary enquiry under s.173(3); he still could not refuse on the ground of territory.

Conclusion. The refusal is illegal. A may send the substance of the information in writing by post to the Superintendent of Police under s.173(4); if that fails, apply to the Magistrate under s.175(3) with an affidavit, or file a complaint under s.223. A writ petition is a last resort (Sakiri Vasu).

How this is examined

Short notes on “Zero FIR” (January 2026), “First Information Report” (August 2024), “Complaint” (February 2025) and “Initiation of a criminal case” (June 2025), and the refusal-to-register problem (February and June 2025). For a 10-mark answer on investigation, follow the stages in section 6 and mark each new BNSS feature (e-FIR, preliminary enquiry, forensic visit, videography, ninety-day progress report).

Now try the real questions: Bharatiya Nagarik Suraksha Sanhita past question papers.