​If the PAN card is lost then you can apply for duplicate PAN card by submitting the Form for "Request for New PAN Card Or/ and Changes or Correction in PAN Data" and a copy of FIR may be submitted along with the form. ​If the PAN card is lost and you don't remember your PAN, then in such a case, you can know your PAN by using the facility of "Know Your PAN" provided by the Income Tax Department. This facility can be availed from the website of the Income Tax Department. ​You can know your PAN online by providing the core details like Name, Father's Name, and Date of Birth. After knowing the PAN you can apply for duplicate PAN card by submitting the "Request For New PAN Card Or/ And Changes Or Correction in PAN Data".