how to cancel old pan card

You can cancel an old or duplicate PAN card either online or offline. Online, you must fill out a 'Changes or Correction in existing PAN Data' application on the NSDL or UTIITSL portal, clearly mentioning the PAN number you wish to surrender in the appropriate section of the form. Alternatively, for an offline process, you can submit the same correction form at a nearby PAN centre, or write a formal request letter to your local Income Tax Assessing Officer detailing the old PAN number and the reason for its cancellation.