Processing a Return To Vendor Order
Once an RTV Order has been saved, the system places any required holds on the order and it tries to allocate inventory to the order lines. An RTV order cannot be shipped out or completed, until any holds on the order have been released, and until inventory has been partially or fully allocated to the order (the partial flag in the order can be set to prevent partial shipments when required).
More:
Clearing the Holds for a Return To Vendor Order