The clerk and head of Budget & Planning Department concurrently acted as the clerk and head of Settlement Department. Besides, the said clerk prepared the Nostro Account Reconciliation Report, too. For example, T. Wongpiyanantakul, the clerk of Budget & Planning Department, acted as clerk of Settlement Department, too. She was responsible for both the settlement of nostro accounts and the preparation of the month-end Nostro Account Reconciliation Report. Besides, C. Lee, the Head of Budget & Planning Department concurrently acted as the Head of Settlement Department. It did not meet the requirement of internal checks and balances.