Folding method for folding at least one flap of a tag, the folding method comprising the steps of: providing at least one package of smoking articles comprising a first wall to which a portion of a tag is applied, the tag comprising at least one flap to be folded which protrudes out of the first wall; providing at least one moving unit comprising at least one contact surface and at least one folding end; feeding the moving unit and the package side by side along a feed section at the same feed speed and at the same mutual distance; bringing the contact surface against the portion of tag applied to the first wall; during the step of feeding the moving unit and the package, maintaining the contact surface against the portion of tag applied to the first wall and simultaneously moving the folding end to fold the flap against a second wall of the package that is transverse to the first wall; characterized in that: the moving unit comprises a support and an arm articulated on the support around a first fulcrum, the arm comprising the contact surface, the method comprises the step of rotating the arm around the first fulcrum to bring the contact surface against the portion of tag; the moving unit comprises a lever articulated on the arm around a second fulcrum, the lever comprising the folding end, the method comprises the step of rotating the lever around the second fulcrum so that the folding end folds the flap. providing at least one package of smoking articles comprising a first wall to which a portion of a tag is applied, the tag comprising at least one flap to be folded which protrudes out of the first wall; providing at least one moving unit comprising at least one contact surface and at least one folding end; feeding the moving unit and the package side by side along a feed section at the same feed speed and at the same mutual distance; bringing the contact surface against the portion of tag applied to the first wall; during the step of feeding the moving unit and the package, maintaining the contact surface against the portion of tag applied to the first wall and simultaneously moving the folding end to fold the flap against a second wall of the package that is transverse to the first wall; characterized in that: the moving unit comprises a support and an arm articulated on the support around a first fulcrum, the arm comprising the contact surface, the method comprises the step of rotating the arm around the first fulcrum to bring the contact surface against the portion of tag; the moving unit comprises a lever articulated on the arm around a second fulcrum, the lever comprising the folding end, the method comprises the step of rotating the lever around the second fulcrum so that the folding end folds the flap. the moving unit comprises a support and an arm articulated on the support around a first fulcrum, the arm comprising the contact surface, the method comprises the step of rotating the arm around the first fulcrum to bring the contact surface against the portion of tag; the moving unit comprises a lever articulated on the arm around a second fulcrum, the lever comprising the folding end, the method comprises the step of rotating the lever around the second fulcrum so that the folding end folds the flap.