The case is very simple and need not be complicated. The proprietory firm can be reconstituted with the designation of a new proprietor. Then there is no bar in opening a new account in the name of the newly constituted firm and all operations can be routed through this account for business continuity. As far as the deceased acount in concerned, the proceeds can be settled through routine claims submitted to bank alongwith death certificate, Consent letters from other legal heirs and legal heirship certificate of the late proprietor. However, in any case the legal heir has no authority to operate the account.