2006 New York Code - Credit Card Surcharge Prohibited.

    §  518.  Credit  card  surcharge  prohibited.  No  seller in any sales
  transaction may impose a surcharge on a  holder  who  elects  to  use  a
  credit card in lieu of payment by cash, check, or similar means.
    Any seller who violates the provisions of this section shall be guilty
  of a misdemeanor punishable by a fine not to exceed five hundred dollars
  or a term of imprisonment up to one year, or both.

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