What is the ruling on trade that relies on displaying clothing designs in an online store, where the customer makes a purchase, and then an external platform undertakes to print the design on the product and send it directly to the customer, given that the price of the product is immediately deducted from the seller's account, while the purchase price reaches him later?

If the described clothing can be precisely specified, it is permissible to sell it by way of salam (forward contract) for a known term, provided that the full price is received at the time of the contract, even if constructively through transfer or deposit. The customary delay in depositing the amount does not matter. As for dealing with the printing platform, it is a istisna' (manufacturing) contract, and the platform's direct shipping of the product to the customer is considered agency on behalf of the seller.