If an applicant wants to apply for a duplicate DL, then he can do so within 6 months from the date of loss of the original DL. If the applicant is not made within the period of 6 months, then the applicant will have to obtain a special permission or get a new license issued.
The applicant is also required to submit an affidavit stating the reason for obtaining a duplicate DL and also mentioning that the original DL will be returned to the RTO if found. The application for obtaining a duplicate DL in West Bengal can be made online or at the RTO. On verification of the documents, the duplicate driving license is issued to the applicant.
In case of theft, an FIR has to be filed at the police station in the jurisdiction of which the license was stolen.