Under the letter of credit, can customers tell each other the information of the shipping company without paying?

You can talk to each other about the shipping company. This is generally stipulated in the letter of credit that the buyer should be informed of the shipping information in time. The letter of credit belongs to the bank's reputation. If the customer does not pay, the bank will generally not hand over the bill of lading to the customer for customs clearance. This has nothing to do with you informing him of the information. If the customer does not have the original bill of lading, it is generally impossible to pick up the goods. If the shipping company delivers the goods without bill of lading, you can sue the shipping company, or discuss with the shipping company in advance under what circumstances it is risky for you.