We purchase items from an overseas vendor.  Once the items are on the ship heading our way, the vendor sends an invoice, and we pay 25% as a deposit on the goods.  However, we have yet to receive the goods.  

They are showing up in my inventory valuation and in my inventory on hand, but they are not fully ours, nor have they been physically received.

Any way to get around this so my inventory count and valuation will be accurate?