Why FIR should be filed promptly?
This is the golden principle of law prescribed in the Code of Criminal Procedure1973 that the First Information Report should always be filed promptly and without wasting any time. Such type of report gains the maximum credibility and is always welcome and appreciated by the courts.

According to Supreme Court the FIR recorded promptly before the time afforded to embellish or do away with the evidence is useful. It eliminates the possible chance of giving rise to suspicion.