Does the aforementioned work in the online store—where goods of known description are displayed and their price is paid to the supplier for him to ship them to the customer under the seller's name, without the goods entering the seller's warehouses—fall under the category of "Bay' al-Salam" (forward sale), and if not, how can it be made to conform to the legitimate Islamic regulations for selling?

If the conditions for the validity of a Salam sale are met, there is no harm in the seller purchasing the commodity from the supplier for himself and then appointing the supplier as his agent to ship it directly to the buyer. This transaction involves two separate Salam contracts (parallel Salam): one contract between the seller and the supplier, and another between the seller and the customer. The supplier is then entrusted with delivering the product to the customer.