What does it mean to be a C and F agent?

I apologized for the answer I did not understand the question

Its C&F agent. They are the "Carry and forward" agent. These people are ones who get your consignments from the port. All kinds of clearance and documents needed are prepared by these agents. 

They do the custom clearance, apply for DO municipality clearance, pay the duty, or port charges, demurrage charges, and everything that's needed to clear your shipment from the port.

I apologize for the answer, I leave the answer to experts specialists in this field, this is not my area.

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