Markus Kopetzky develops hypotheses about price psychological effects on the propensity for customer fraud and empirically tests these in laboratory and field studies based on more than 100,000 customer data points. The author demonstrates that companies can influence customers' price perception and thus their tendency to commit fraud through targeted price presentation. With price psychology, he confirms an effective lever for managing the costly issue of customer fraud. The findings assist companies in deciding on psychologically optimal price communication.