Can police take suo motto on false complaint?

Police cannot take action of false complaint.

The aggrieved person should approach the court after the complaint has been declared false and the person so charged is acquitted.

Police are only mortal and Prophesy is not the function of the Police or the Court for that matters. Once a complaint of reasonable cognizable offence is filed, police must investigate the case, and it is not the police duty to say that the offence alleged is false. The offence may be false but the police has to filed the report to the court.. 

Greetings!

The police may only declare a complaint as false, but the aggrieved party needs to approach the court.