Clean collection refers to the collection of financial documents without any commercial documents. What are the benefits of clean collection for the payee? L security-there are great risks in mailing the payment directly to the payer, and collecting money through the inter-bank international network can avoid these risks, which is a safer way to collect money; Convenience-the network of international banks is all over the world, which can help recipients receive money from all over the world very conveniently; L Express delivery-if the collecting bank signs a "sight letter of credit" agreement with the paying bank/collecting bank, the collection time can be greatly shortened and the service is very convenient; Low cost-the bank charge for clean bill collection is relatively low. Under what circumstances, it is appropriate to choose clean collection of small payments under trade and non-trade items; L foreign currency cash that cannot be exchanged in China (including residual currency); L a business of collecting foreign exchange checks, promissory notes, foreign bonds, certificates of deposit and other valuable documents; L Transactions that cannot or are inconvenient to provide commercial documents, such as sending samples, software and other high-tech products, seasonal goods, services and intangible trade such as technology transfer. At present, the banks that can collect clean bills are: Bank of China, Agricultural Bank of China and Industrial and Commercial Bank of China.