This document provides an overview of internal controls over cash and marketable securities. It defines cash and marketable securities, discusses motives for holding them, and outlines internal control techniques including segregation of duties, documentation procedures, and independent verification. Specific internal controls are described for cash receipts, disbursements, bank reconciliations, and petty cash. Limitations of these controls including risks of fraud like check kiting and lapping are also covered. The document concludes with an audit program for evaluating controls over marketable securities.