If a bank locker holder passes away without nominating anyone, their legal heirs may need to approach the court. If there's a dispute among heirs, a court order is typically required. In the absence of disputes, banks might allow access based on documents like a legal heirship or succession certificate, though these are often for other purposes. Banks usually require nomination, but if one wasn't made, legal heirs may need a succession certificate and court permission to open and claim the locker's contents.