This document provides information about increased scrutiny on customs entries in the new ACE environment. It discusses what ACE is and how it allows for greater scrutiny of entry data by customs. This may result in importers receiving Requests for Information (CF-28) and Notices of Action (CF-29) about classification, valuation, or other issues. The document provides examples of a CF-28 and CF-29 and tips for importers, such as reviewing classifications and having a clear plan for responding to CF-28s.