selling an item before taking possession of it

Drop shipping

Q: Is the trading concept of ‘drop shipping’ permissible? In ‘drop shipping’, the trader does not keep stock of any item. Instead, he accepts payment for the goods and then forwards the customer’s details to the supplier who will deliver directly to the customer. ‘Drop shipping’ is commonly found in online shopping. Is this permissible?

Selling an item before taking possession of it

Q: Salmaan owns a grocery store. Ismail phoned him and purchased a pack of long life milk from him. After concluding the sale on the phone, Ismail did not take possession of the milk but instead sold the milk to Bakr and asked Salmaan to deliver the milk directly to Bakr instead of bringing it to his store. Is it correct for Ismail to sell the milk to Bakr before taking possession of it?