Following the latest round of cost-cutting measures at ABC Corporation, the Treasury Department retained a headcount of 2 individuals. While the analyst was out sick, she gave her password to her Manager so that payments could be released via the bank's wire transfer system. The Manager sent 3 wires out with incorrect banking instructions. The problem was not identified until the angry suppliers called several weeks later demanding payment. The corporation has not yet recovered the $130,000 sent to erroneous accounts. In this instance, which control failed for ABC Corp.?