Many weeks after a depositor's death, Chase Manhattan Bank paid 12 checks on deceased depositor's account. The depositor's signature on the checks had been imitation. The estate sued Chase, and Chase sued estate's attorneys. The estate's attorneys advised Chase of depositor's death. Three weeks before Chase paid any of forged checks, the attorney's gave Chase a copy of the death certificate and the court order to inspect his deposit box. Of the parties mentioned, is anyone accountable?