Summary: Reconciliations of federal agencies' fund balances with Treasury accounts continue to be a significant problem, contributing to GAO's inability to render an opinion on the government's financial statements for fiscal year 1998. The Treasury has designed various procedures and controls--called the reconciliation process--to ensure the reliability of receipt and disbursement data reported by agencies. This monthly reconciliation process, similar in concept to individuals reconciling personal checkbooks with a bank's records each month, is intended to be a key internal control over the federal receipts and disbursements that flow through these accounts. Auditors continued to find significant problems with federal agencies' reconciliations of fund balances with Treasury accounts in fiscal year 1998. These agencies either were not timely in reconciling their fund balances with Treasury accounts or were adjusting their accounts to match the amounts reported by Treasury. These adjustments were made without adequately researching the cause of the differences and thus without knowing which number, if any, was correct. Auditors reported that the lack of effective internal control procedures was, in general, the underlying cause of agency reconciliation problems. Auditors reported that improper reconciliations contributed to management's failure to detect fraud and mismanagement of funds at two agencies. GAO reported that ineffective cash disbursement reconciliations affect the reliability of the government fiscal year 1998 financial statements and the underlying financial information. GAO also reported that the failure of agencies to properly reconcile their disbursements increases the risk of inaccuracies in the President's budget and contributes to the overall inability of the federal government to accurately measure the full cost of its programs.