When the law states that the criminal aspect startes only on expiry of 15 days (not on cheque bounce, not on notice, only on failure to pay within 15 Days), so prematurely filing complaint is without any legal sanctions and must be thrown aside. Ignorance cannot be admitted by court of law, complainant or his learned counsel can neither say that it was a mistake nor can they plead that they were ignorant.
The question is who and when this irregularity was observed ?
For argument sake if we say that this irregularity was found before the expiry of stipulated period, then no one would have stopped the complainant to file the complaint again.
If the irregularity was observed by the accused after the trial started, then the benefit of accused vigilance cannot be given to complainant.
If the irregularity was found out by the complainant during the course of proceeding, then also he cannot seek for amendment, as the complaint is ab initio defective. So question infront of honorable SC is just the wastage of time, it has no merit, the complainant is not at all prejudiced by technicality, but accused is because he was made accused even before the cause of action, so he has the right to get the complaint quashed. Complainant can seek civil remedy.
The SC will also consider the aspect that in general criminal cases are not stopped by delays or latches, but cases under S.138 are regulatory offences between two parties, they are quasi civil and quasi criminal in nature so strict compliance to law has to be there before anyone can be made accused.