Contact the adjudication office at the DMV.Chances are, the ticket is from one of the municipalities and and RITT will not be able to see it.
I would try contacting the traffic tribunal office they would have records of it if you are coming up with a suspension on your record. DMV would probably only have current information.
I'm sure this citation has been dismissed the best way you can do is look up your name on the DLT website
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