Treasury OIG should follow-up with the DC's management to confirm if the $30,107 noted as unsupported expenditures within Aggregate Payments to Individuals can be supported. If support is not provided, Treasury OIG should recoup the funds or request DC's management to provide support for replacement expenses, not previously charged, that were eligible during the CRF period of performance. Further, based on the DC management's responsiveness to Treasury Office of Inspector General requests and its ability to provide sufficient documentation, and/or replace unsupported transactions charged to CRF with valid expenditures, Treasury Office of Inspector General should determine the feasibility of conducting an audit for the Aggregate Payments to Individuals payment type.