Selling products that are not in one's possession
Q: I would like to know if I can deal in the following ways:
1. Sell a product on an online platform and receive payment (part or full) but the product is not in my possession.
2. Sell a product on an online platform and receive payment (part or full) but the product is in the stock of my supplier who promises to send me when I have confirmed the order.
3. Being the official rep of a particularly expensive but slowly moving product, can I take orders with part or full payment and then place the order with my supplier?