A knotter system has a billhook a twine receiver a twine delivering system for delivering twines across the billhook to the twine receiver a swing arm having a lower end portion with a knife blade, moveable below the billhook, a first drive to make the billhook perform at least a first and a second full rotation to move the swing arm two times from a backward to a forward position and back to form respectively a first and second consecutive knot wherein the twine receiver comprises a rotatable twine disc and a twine holder adapted to clamp twines against the twine disc wherein said twine disc is provided with at least a first and a second notch for receiving the twines, and a protruding ridge located after the second notch, such that the twine holder is pushed by the ridge during and/or after the formation of the second knot.
