I Know in the union I belong to, if a hospital employee does not wish to be part of the union due to religious or personal beliefs, they still have the 'union dues' deducted from each paycheque, however, the dues are donated to a charity of the person's choice. They still have the benefits of belonging to the union (ie: negotiated contracts, etc) but do not actually belong. This causes some problems, as we recently underwent job action (a strike) and these people were crossing legal picket lines to work contrary to union rules. Its surely a confusing issue.