What is the ruling of Sharia on salam (forward) sale through an Islamic bank, according to the steps mentioned, and am I sinful if there is a defect in the conditions of salam sale on the part of the bank?

The mentioned transaction is the organized salam (forward sale), and some contemporary jurists have objected to it due to the suspicion of it being a superficial transaction or a legal trick, given that its procedures take place only between the client and the bank, and the bank acts as an agent for the client. However, if the bank has a trustworthy Sharia supervisory board, there is no harm for someone who follows its rulings in engaging in this transaction.