This guide is designed to provide merchants and retailers with a framework for understanding the underlying causes of their shoplifting problems and developing effective strategies to reduce shoplifting. It describes ways in which data on shoplifting can be collected and analyzed, helps readers identify and close off opportunities for shoplifting, and provides guidance on measuring the impact of those strategies. The guide offers an array of shoplifting prevention strategies that may prove effective, including conducting employee bag checks at the end of each shift, partnering with local schools on anti-truancy efforts, increasing visible security guard presence during after-school hours, and tightening inventory control protocols.