Milind Bharambe, Joint Commissioner of Police (Crime), confirmed that Republic TV's CFO has been called.
The summons to Sundaram said there are reasonable grounds to believe that he is "acquainted with certain facts and circumstances of the matter and the same are required to be ascertained".
He was asked to come to the city police's headquarters around 11 am, an official said.
The Crime Intelligence Unit (CIU) of Mumbai Crime Branch is investigating the fake TRP racket.
On Thursday, the police arrested four persons including owners of Fakt Marathi and Box Cinema in the case.
Mumbai Police Commissioner Param Bir Singh claimed that three channels including Republic TV manipulated the TRP.
The racket came to light when BARC, an organization which measures TRP, filed a complaint in this regard through Hansa Research Group Pvt Ltd, the police said.