We are trading a large amount of goods with a Thai customer, and the customer is requesting full payment in L/C, as they have been cheated before. We also know that L/C is a highly secure way, but without deposit, it will be difficult to purchase raw materials for such a large order. So, is it possible to indicate the deposit and the remaining amount at the time of the issuance of the credit, so that after receiving the L/C, the bank can pay us the amount of the deposit stated in the credit in advance?