Use the post office to collect money for fraud

Case: Not long ago, a Zhangjiagang citizen named Li received a call from a company in Beijing, claiming to be a credit customer of the company and had mailed him a package. A cheap and good-quality mobile phone. When Li went to the post office to receive the mobile phone, the post office asked him to pay before allowing him to open the package and inspect the goods. After Li paid for the mobile phone price indicated on the package, he opened the package and found that there was no mobile phone in the package. When Li asked the post office to refund the payment, the post office said that once it takes over the other party's business of collecting payment, as long as the recipient signs for the goods, the post office must remit the received payment to the other party's post office within a few days. It is understood that many people in Zhangjiagang City have been defrauded of money in this way recently, and they need to be vigilant.