Police have registered a case against a couple for allegedly duping a trader in Navi Mumbai to the tune of nearly Rs 16 crore by not making payments to him against the purchase of food grains in the last few years, an official said on Saturday.

The victim, who runs the food grains business at the Agriculture Produce Market Committee in Navi Mumbai's Vashi, recently lodged a complaint against the trader couple, based on which they were booked under Indian Penal Code (IPC) sections 420 (cheating), 409 (criminal breach of trust), he said.