If a discrepancy is identified during an external reconciliation process, the firm is required to investigate and correct it as soon as possible. The CISI UAE Financial Rules and Regulations emphasize that discrepancies, whether in financial data or operational procedures, must be thoroughly examined to determine the root cause and rectified promptly. Immediate corrective action helps to ensure that financial statements and other reports remain accurate and reliable, preventing any further errors or compliance issues. While it may be necessary to inform the regulator or suspend operations in extreme cases, the first priority is to address the discrepancy through investigation and correction.