Here is a judgment that states that the police need to register a case if the offence is cognizable. This judgment is important in light of the recent Judgment by Justice Dhingra.
Here is an excerpt:
“The mandate of Section 154 of the Code is that at the stage of registration of a crime or a case on the basis of the information disclosing a cognizable offence, the police officer concerned cannot embark upon an enquiry as to whether the information, laid by the informant is reliable and genuine or otherwise and refuse to register a case on the ground that the information is not relevant or credible. In other words, reliability, genuineness and credibility of the information are not the conditions precedent for registering a case under Section 154 of the Code. ”
Here is the judgment: Police Duty Bound To Register A Case If It Is A Cognizable Offence