A Resistance against the Federation was claimed to exist by an android pretending to be Harry Mudd.
The impostor claimed that contrary to their prevarication about "peaceful exploration", the Federation wanted total hegemonic supremacy and would not stop until they had consolidated power across the entire quadrant. He further claimed to be a member of this Resistance, which nobody knew about except the resistors, because it was a secret Resistance.
Indeed, upon hearing about it, Tellarite bounty hunter Tevrin Krit said to have never heard of the movement. The impostor then offered him the opportunity to join this supposed Resistance, claiming they were kindred spirits, but the Tellarite was not interested. (ST: "The Escape Artist")