F.I.R. stands for "First Information Report," which is a document prepared by police in India when they receive information about a cognizable offense. It serves as the initial record of the complaint and is crucial for starting an investigation. The F.I.R. includes details such as the nature of the crime, the parties involved, and the time and place of the incident. Once filed, the F.I.R. is registered in the police station's records, and a copy is provided to the complainant. It is an essential legal document that helps ensure accountability and transparency in the law enforcement process, allowing for further legal action to be taken against the accused.