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