The National Board of Revenue on Wednesday issued two letters asking all scheduled banks and financial institutions to send information regarding the bank accounts of Debapriya Bhattacharya and his wife Irina Bhattacharya.All scheduled banks and financial institutions will have to send information regarding their bank accounts from the date of opening to date, saving instruments, vault, credit cards and FDR within 7 days.The authorities also sought information on investment in the share market by the duo and their family members.