2006 New York Code - Bank Not Obligated To Pay Check More Than Six Months Old.

 
  Section 4--404. Bank  Not  Obligated  to  Pay Check More Than Six Months
                    Old.
    A bank is under no obligation to a customer having a checking  account
  to  pay  a  check, other than a certified check, which is presented more
  than six months after its date, but it may charge its customer's account
  for a payment made thereafter in good faith.