815 ILCS 415/1

That it shall be the duty of owner or owners of any railroad or steamboat for the transportation of passengers, to provide each agent, who may be authorized to sell tickets, or other certificates entitling the holder to travel upon any railroad or steamboat, with a certificate setting forth the authority of such agent to make such sales; which certificate shall be duly attested by the corporate seal of the owner of such railroad or steamboat.