I invite viewer input if there is any limit a broker may charge as stamp duty on F&O.

Hello fellow traders and investors,

I wanted to know if there is any limit a broker may charge as stamp duty on F&O?

For eg. even tho stamp duty is 0.002%, can a broker charge lets say 1% or .1% as stamp duty by framing it as "Stamp duty and other charges?"

I feel all miscellaneous charges would be covered by the brokerage charges, and so this should be illegal.

Pls may I request the input of any of the viewers?

Thanks.