To prevent contract fraud, you can refer to the following points: 1. Verify the authenticity of the personnel and units of the other party. 2. Collect information from various sources. Manufacturers can use all kinds of social relations to collect all kinds of information about strange trading partners, focusing on obtaining information about their economic strength and performance ability. 3. Pay attention to the abnormal phenomena in the trading process. Although criminals have racked their brains to come up with many hidden contract fraud methods, they are not untraceable in the implementation process, which requires businesses to pay more attention to some abnormal phenomena in the transaction process, such as sudden increase in transaction volume after several transactions, delay in delivery, inconsistent information provided by the other party, frequent changes in contact information, and so on. 4. Minimize the separation of goods and people. Criminals want to defraud goods. In most cases, they will try their best to separate the delivery man from the goods. While delaying the delivery man, their accomplices temporarily hid the goods. Therefore, if the supplier does not receive enough payment at the time of delivery, it should avoid the separation of people and goods and give the criminals an opportunity.