Final answer:
The internal control described is inadequate due to the lack of segregation of duties, which increases the risk of errors and fraud. Effective internal control requires duties to be divided among different employees.
Step-by-step explanation:
The internal control process described in the question presents inadequate internal control due to the lack of segregation of duties. When a mailroom employee is tasked with both pre-listing receipts and preparing the deposit slip, there is an increased risk of errors or potential fraud since one individual has control over the entire initial phase of the cash handling process. In an effective internal control system, duties should be segregated to reduce risks; for instance, one employee should pre-list receipts, another should prepare deposit slips, and a third should carry out the deposit, with each step being independently verified.
In the scenario provided, Noel's actions showcase the importance of vigilance and communication in the internal control process. Noel noticed an error and proactively utilized various communication methods to alert the accounting department and related personnel, emphasizing the speed at which corrective action can be induced when potential issues are identified swiftly.