Final report has been defind under section 173 of Cr.P.C which is called charge sheet in the normal parlance.
The meaning of final report is that the investigation in the case is over and now the case is before the Court for further action. If as per the final report no offence has been made out against the accused then you are at liberty to file objections to the same being the informant and in case the final report makes out offence against the accused person, then court will take cognizance of the same and will issue notice to the Accused. Thereafter, accused have to appear and have to furnish bail bonds.
It is no where mentioned that Final report means false report as per Cr.P.C.
What you are talking about is the closure report. In case a closure report is filed then the complainant is required to file objection. It is always open for the Court to discard the opinion given by the investigating agency and if court find that a prime facie case is made out then court can proceed ahead.