In FY 2018, S&T did not always adhere to DHS and internal purchase card policies and procedures.  Of 421 purchase card transactions selected for review, we identified 394 transactions that did not have required supporting documentation, separation of key transaction duties, approvals and other required signatures, or compliance with other risk-based procedures.  According to S&T officials, these issues were due to shortfalls in program oversight and training, as well as outdated policy.  We identified $63,213 in questionable costs associated with purchase card transactions.  We made four recommendations to improve S&T’s adherence to DHS policies and procedures for its Bankcard Program.  S&T concurred with the four recommendations.