Final answer:
During an audit, the independent auditor should communicate in writing to the client's senior management and those charged with governance when a weakness is identified in the client's internal control.
Step-by-step explanation:
When an independent auditor identifies a weakness in a client's internal control during an audit, they have a responsibility to communicate this finding to the client's senior management and those charged with governance. This communication should be done in writing to ensure accuracy and clarity.
The goal of this communication is to inform the client's management and governance about the identified weakness and its potential impact on the effectiveness and efficiency of the client's internal controls. It also helps the client understand the need for corrective actions to address the weakness and improve their internal control system.