New York Consolidated Laws, Railroad Law - RRD § 59. Penalty for excessive fare

Any railroad corporation, which shall ask or receive more than the lawful rate of fare, unless such overcharge was made through inadvertence or mistake, not amounting to gross negligence, shall forfeit fifty dollars, to be recovered with the excess so received by the party paying the same; but no action can be maintained therefor, unless commenced within one year after the cause of action accrued.