Prevention of contract fraud can be from reference to the following points: 1, verify the authenticity of the other party's personnel, units. 2, multi-party information collection. Vendors can use a variety of social relations, collect unfamiliar with the object of the transaction of a variety of information, focusing on obtaining the other side of the economic strength, fulfillment ability of the information. 3, pay attention to the transaction process of the anomaly. Although the lawless elements racked their brains to come up with a number of more covert contract fraud methods, but in the implementation of the process is not traceable, which requires merchants in the course of the transaction a few more mind, pay attention to some anomalies, such as several transactions after a sudden increase in the volume of transactions, handing over of the goods delayed, the other side of the personnel to provide the situation is inconsistent with each other, and frequent changes in contact information, etc. 4, to avoid the appearance of the people and goods to the maximum extent possible Separation of the situation. Unlawful elements want to cheat the goods, the vast majority of cases are trying to find ways to make the delivery of goods and the separation of goods, while dragging the delivery of goods at the same time, their accomplices will temporarily hide the goods. Therefore, the supplier in the delivery of goods, such as not receiving sufficient payment, should avoid the separation of people and goods, to the lawless elements to take advantage of the opportunity.