What is a FIR ? Zero fir the report given to the police at first instance Simply information given to the police scenario If there is an accident call the police he will record the information and provide a FIR for accident claims. If there is a murder the information from any person would be the first information that would be recorded in FIR. police never record a FIR unless until grave offence. You can give a call to police to record the information post the same should be given in writing within three days.