In general, eCOST.com has specific policies regarding changes to delivery addresses after an order has been placed. Typically, if the order has not yet been processed or shipped, it may be possible to modify the delivery address. However, once an order is in the shipping process, changes may not be allowed. It is advisable to check the current web page for detailed information about their policies, as well as any instructions for managing your order. If changes are required, acting as quickly as possible is often beneficial, since the window for making such modifications can be limited. Remember to have your order details on hand when attempting to make any changes, as this will facilitate the process.