When traveling overseas, I am parting from a group. Is it legal for the travel agency to charge me a group fee? Does the travel agency have the right to charge the so-called group fee?

In fact, no one can decide whether this is legal or not. It is a voluntary and mutually beneficial cooperation. If you leave the local group and fail to return, the travel agency that sent you the visa will be punished, and in serious cases, it may be suspended, so The corresponding deposit is collected just to protect yourself. Of course, you can also say not to pay it, but whether it will allow you to leave the group is another matter. Because when signing the travel contract, it should be clearly stated that passengers are not allowed to leave the group locally, and it is also to ensure the safety of passengers.