The contention advanced by the learned senior standing counsel for the respondent that since Permanent Account Number of late Shri Kanubhai Nagjibhai Rajpara was active, it can be presumed that tax payer was alive, cannot be sustained in view of the fact that only because Permanent Account Number is active, petitioner or any assessee is not liable to file the return of income and on that basis it cannot be presumed that the assessee is alive, more particularly, when the department is made to know about the death of the assessee prior to issuance of the impugned notice.In view of the aforesaid settled legal proposition that no valid notice can be issued against a dead person, the impugned notice is required to be quashed and set aside.