Generally, it is necessary to avoid risks reasonably from the following aspects: 1, log in to the account to check whether the money really arrives (this has two advantages, one is to prevent scammers from notifying payment by email; Second, check whether the other party's money has really arrived. Some users pay by e-check when it is due, instead of paying immediately. Second, if you confirm that you have received the money, write an email to the other party's payment mailbox (the advantages of this are: first, avoid the other party's account being stolen; Second, let customers feel thoughtful service, kill two birds with one stone. After receiving the payment, the goods will be delivered 24-48 hours later (PayPal has a powerful risk detection system, which can effectively help users check the stolen credit card) 4. Fully communicate with the buyer to explain the real situation of the goods, including the defects of the products, the corresponding after-sales service and the return of goods (foreigners are honest and generally know in advance, so you won't make trouble afterwards) 5. After delivery, add the delivery number to the PayPal account and tell the buyer the delivery number (this is mainly to improve credit, let PayPal see that this is a real and normal transaction, and let the buyer know the trend of the products he bought).