Technically you own the items you purchased from the vendor/supplier but the timing of ownership between purchasing and shipping it to the client becomes negligible because it's right away shipped to your customer. Some business industries still do recognize inventory asset in their GL during posting but simply reverse it out once the item has been shipped to by the vendor to your customer which is also the time they record the vendor bill/invoice. If you want to do this type of process, one way of doing it in NetSuite is to use Special Order (This is just a workaround through cause in the system you would still need to receive the item before you can record the fulfillment - It doesnt really fit the definition of dropship but it achieves what you are looking for)