FIR stands for First Information Report. It is a document that is filed by a person who is aware of the commission of a cognizable offense, which means an offense where the police can make an arrest without a warrant. The FIR is filed with the police and is the first step in starting the investigation of the crime.

The FIR contains details of the offense, the name and address of the complainant, and the name and address of the accused, if known. The FIR is an important document because it sets the tone for the entire investigation and provides important information for the police to begin their work.

NC stands for Non-Cognizable offense. It is an offense where the police cannot make an arrest without a warrant. Examples of non-cognizable offenses include offenses such as defamation or causing a public nuisance. In such cases, the police cannot take any action on their own and require a court order to begin the investigation.

If someone wishes to report a non-cognizable offense, they can file an NC complaint with the police. The police will then record the complaint in a register and provide a copy of the complaint to the complainant. However, the police will not take any further action unless directed by the court.